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X - Possible homology level

H - Homology level

T - Topology level

F - Family level

* - Provisional representative


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Evolutionary classification of protein domain structures

alpha arraysalpha-helix arrays with mainly perpendicular helices

alpha bundlesalpha-helix bundles with mainly parallel helices

alpha superhelicesrepeating alpha-helix hairpins form a superhelix

alpha duplicates or obligate multimersalpha duplicates or monomers associate together to form a compact domain

alpha complex topologyalpha domain with complex and unique topology that cannot be described as array or bundle or superhelix

X: alpha-helical domain in beta-lactamase/transpeptidase-like proteins
H: alpha-helical domain in beta-lactamase/transpeptidase-like proteins
T: alpha-helical domain in beta-lactamase/transpeptidase-like proteins
F: Transpeptidase

PF00905 CL0013

Representatives:

e1k55A1[A:63-160] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

BETA LACTAMASE OXA-10 ; ligands: EDO,SO4 ; X-RAY DIFFRACTION 1.39Å

e1k38A1[A:63-160] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH

BETA-LACTAMASE OXA-2 ; ligands: FMT ; X-RAY DIFFRACTION 1.5Å

e1m6kA1[A:63-166] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

BETA-LACTAMASE OXA-1 ; ligands: MPD ; X-RAY DIFFRACTION 1.5Å

e3udfA3[A:431-530] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Penicillin-binding protein 1a ; ligands: MES ; X-RAY DIFFRACTION 1.7Å

e1vqqA1[A:400-525] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed,

PENICILLIN-BINDING PROTEIN MECA, LOW-AFFINITY ; X-RAY DIFFRACTION 1.8Å

e5qasA1[A:63-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-lactamase ; ligands: CVF,EDO ; X-RAY DIFFRACTION 1.90Å

e5qasB2[B:63-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-lactamase ; ligands: CVF ; X-RAY DIFFRACTION 1.90Å

e5qasC2[C:63-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-lactamase ; ligands: CVF ; X-RAY DIFFRACTION 1.90Å

e5qasD2[D:63-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-lactamase ; ligands: CVF ; X-RAY DIFFRACTION 1.90Å

e5qatA1[A:63-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-lactamase ; ligands: EDO,T7O ; X-RAY DIFFRACTION 1.90Å

e5qatB2[B:63-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-lactamase ; ligands: T7O ; X-RAY DIFFRACTION 1.90Å

e5qatC2[C:63-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-lactamase ; ligands: EDO,T7O ; X-RAY DIFFRACTION 1.90Å

e5qatD2[D:63-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-lactamase ; ligands: EDO,T7O ; X-RAY DIFFRACTION 1.90Å

e5qauA2[A:63-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-lactamase ; ligands: EDO ; X-RAY DIFFRACTION 1.75Å

e5qauB1[B:63-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-lactamase ; ligands: EDO ; X-RAY DIFFRACTION 1.75Å

e5qauC2[C:63-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-lactamase ; ligands: EDO,V7V ; X-RAY DIFFRACTION 1.75Å

e5qauD2[D:63-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-lactamase ; ligands: EDO,V7V ; X-RAY DIFFRACTION 1.75Å

e5qavA2[A:63-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-lactamase ; ligands: EDO ; X-RAY DIFFRACTION 1.72Å

e5qavB1[B:63-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-lactamase ; X-RAY DIFFRACTION 1.72Å

e5qavC2[C:63-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-lactamase ; ligands: EDO,L43 ; X-RAY DIFFRACTION 1.72Å

e5qavD2[D:63-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-lactamase ; ligands: EDO,L43 ; X-RAY DIFFRACTION 1.72Å

e5qawA2[A:63-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-lactamase ; ligands: TVC ; X-RAY DIFFRACTION 2.20Å

e5qawB1[B:63-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-lactamase ; X-RAY DIFFRACTION 2.20Å

e5qawC2[C:63-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-lactamase ; ligands: TVC ; X-RAY DIFFRACTION 2.20Å

e5qawD2[D:63-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-lactamase ; ligands: TVC ; X-RAY DIFFRACTION 2.20Å

e5qaxA2[A:63-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-lactamase ; ligands: EDO,Q92 ; X-RAY DIFFRACTION 2.31Å

e5qaxB2[B:63-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-lactamase ; ligands: EDO,Q92 ; X-RAY DIFFRACTION 2.31Å

e5qaxC1[C:63-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-lactamase ; ligands: Q92 ; X-RAY DIFFRACTION 2.31Å

e5qaxD1[D:63-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-lactamase ; ligands: EDO,Q92 ; X-RAY DIFFRACTION 2.31Å

e5qayA1[A:63-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-lactamase ; ligands: X6P ; X-RAY DIFFRACTION 1.70Å

e5qayB1[B:63-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-lactamase ; ligands: EDO,X6P ; X-RAY DIFFRACTION 1.70Å

e5qayC2[C:63-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-lactamase ; ligands: X6P ; X-RAY DIFFRACTION 1.70Å

e5qayD1[D:63-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-lactamase ; ligands: EDO,X6P ; X-RAY DIFFRACTION 1.70Å

e5qazA1[A:63-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-lactamase ; ligands: Q2S ; X-RAY DIFFRACTION 2.20Å

e5qazB2[B:63-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-lactamase ; ligands: Q2S ; X-RAY DIFFRACTION 2.20Å

e5qazC1[C:63-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-lactamase ; ligands: EDO,Q2S ; X-RAY DIFFRACTION 2.20Å

e5qazD1[D:63-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-lactamase ; ligands: Q2S ; X-RAY DIFFRACTION 2.20Å

e5qb0A2[A:63-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-lactamase ; ligands: AVA,EDO ; X-RAY DIFFRACTION 1.950Å

e5qb0B1[B:63-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-lactamase ; ligands: AVA,EDO ; X-RAY DIFFRACTION 1.950Å

e5qb0C1[C:63-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-lactamase ; ligands: EDO ; X-RAY DIFFRACTION 1.950Å

e5qb0D2[D:63-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-lactamase ; ligands: AVA,EDO ; X-RAY DIFFRACTION 1.950Å

e5qb1A1[A:63-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-lactamase ; ligands: EDO ; X-RAY DIFFRACTION 1.80Å

e5qb1B2[B:63-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-lactamase ; ligands: EDO,F1C ; X-RAY DIFFRACTION 1.80Å

e5qb1C1[C:63-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-lactamase ; ligands: EDO ; X-RAY DIFFRACTION 1.80Å

e5qb1D1[D:63-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-lactamase ; ligands: EDO,F1C ; X-RAY DIFFRACTION 1.80Å

e5qb2A2[A:63-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-lactamase ; ligands: EDO,U3M ; X-RAY DIFFRACTION 1.75Å

e5qb2B1[B:63-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-lactamase ; ligands: U3M ; X-RAY DIFFRACTION 1.75Å

e5qb2C1[C:63-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-lactamase ; X-RAY DIFFRACTION 1.75Å

e5qb2D1[D:63-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-lactamase ; X-RAY DIFFRACTION 1.75Å

e5qb3A1[A:63-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-lactamase ; ligands: AVM ; X-RAY DIFFRACTION 2.00Å

e5qb3B1[B:63-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-lactamase ; ligands: AVM ; X-RAY DIFFRACTION 2.00Å

e5qb3C1[C:63-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-lactamase ; ligands: AVM,EDO ; X-RAY DIFFRACTION 2.00Å

e5qb3D1[D:63-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-lactamase ; ligands: AVM ; X-RAY DIFFRACTION 2.00Å

e5qb4A1[A:63-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-lactamase ; ligands: IM2 ; X-RAY DIFFRACTION 1.95Å

e5qb4B1[B:63-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-lactamase ; ligands: IM2 ; X-RAY DIFFRACTION 1.95Å

e5qb4C1[C:63-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-lactamase ; ligands: IM2 ; X-RAY DIFFRACTION 1.95Å

e5qb4D2[D:63-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-lactamase ; ligands: IM2 ; X-RAY DIFFRACTION 1.95Å

e5wi3B1[B:74-160] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

OXA-239 ; ligands: PCZ ; X-RAY DIFFRACTION 1.81Å

e5wi3A1[A:74-160] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

OXA-239 ; ligands: PCZ ; X-RAY DIFFRACTION 1.81Å

e5wi7A2[A:74-160] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

OXA-239 ; ligands: 4J6 ; X-RAY DIFFRACTION 1.861Å

e5wi7B2[B:74-160] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

OXA-239 ; ligands: 4J6 ; X-RAY DIFFRACTION 1.861Å

e5wibA1[A:74-160] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

OXA-239 ; ligands: ID1 ; X-RAY DIFFRACTION 1.868Å

e6goaA1[A:63-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-lactamase ; X-RAY DIFFRACTION 2.55Å

e5oftA1[A:63-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-lactamase ; X-RAY DIFFRACTION 3.2Å

e6b22A1[A:77-173] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-lactamase ; ligands: C8Y,CL ; X-RAY DIFFRACTION 1.930Å

e6goaB1[B:63-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-lactamase ; X-RAY DIFFRACTION 2.55Å

e6goaC1[C:63-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-lactamase ; X-RAY DIFFRACTION 2.55Å

e6goaD1[D:63-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-lactamase ; X-RAY DIFFRACTION 2.55Å

e6goaE1[E:63-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-lactamase ; X-RAY DIFFRACTION 2.55Å

e6goaF1[F:63-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-lactamase ; X-RAY DIFFRACTION 2.55Å

e6goaG1[G:63-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-lactamase ; ligands: CL ; X-RAY DIFFRACTION 2.55Å

e6goaH2[H:63-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-lactamase ; ligands: CL ; X-RAY DIFFRACTION 2.55Å

e5oftB2[B:63-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-lactamase ; X-RAY DIFFRACTION 3.2Å

e6mkaA4[A:418-544] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

penicillin binding protein 5 (PBP5) ; ligands: SO4 ; X-RAY DIFFRACTION 2.70Å

e6bsqA3[A:420-543] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

PBP4 protein ; ligands: CL ; X-RAY DIFFRACTION 1.8Å

e6mkfA1[A:418-544] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

penicillin binding protein 5 (PBP5) ; ligands: IM2,SO4 ; X-RAY DIFFRACTION 2.80Å

e6mkgA2[A:418-544] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

penicillin binding protein 5 (PBP5) ; ligands: PNM,SO4 ; X-RAY DIFFRACTION 2.930Å

e6mkjA2[A:418-544] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

penicillin binding protein 5 (PBP5) ; X-RAY DIFFRACTION 2.86Å

e6bsrA2[A:420-543] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

PBP4 protein ; ligands: CL,GOL,PEG ; X-RAY DIFFRACTION 2.340Å

e6mkhA1[A:420-543] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

pencillin binding protein 4 (PBP4) ; ligands: IM2 ; X-RAY DIFFRACTION 2.62Å

e6mkiA2[A:420-543] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

penicillin-binding protein 4 (PBP4) ; ligands: AI8 ; X-RAY DIFFRACTION 2.98Å

e6n6tA1[A:74-160] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-lactamase oxa23 ; ligands: FLC ; X-RAY DIFFRACTION 1.25Å

e6n1nA1[A:58-158] Image Pymol Jmol Links: PDB, SCOP, CATH

Beta-lactamase ; ligands: GOL,SO4 ; X-RAY DIFFRACTION 1.60Å

e6n6uA1[A:74-160] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-lactamase ; ligands: ID1 ; X-RAY DIFFRACTION 1.55Å

e6n6vA1[A:74-160] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-lactamase ; ligands: KE1 ; X-RAY DIFFRACTION 1.55Å

e6n6wA2[A:74-160] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-lactamase oxa23 ; X-RAY DIFFRACTION 3.250Å

e6n6xA1[A:74-160] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-lactamase oxa23 ; ligands: ID1,SO4 ; X-RAY DIFFRACTION 3.1Å

e6n6yA1[A:74-160] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-lactamase oxa23 ; ligands: KE1 ; X-RAY DIFFRACTION 3.5Å

e6nhuC2[C:56-160] Image Pymol Jmol Links: PDB, SCOP, CATH

Beta-lactamase ; ligands: EDO ; X-RAY DIFFRACTION 2.3Å

e6ni0A1[A:49-155] Image Pymol Jmol Links: PDB, SCOP, CATH

Beta-lactamase ; ligands: CL,SO4 ; X-RAY DIFFRACTION 2.3Å

e6nhsA1[A:80-182] Image Pymol Jmol Links: PDB, SCOP, CATH

Beta-lactamase ; ligands: CL,EDO,FMT ; X-RAY DIFFRACTION 2.0Å

e6nlwA2[A:66-163] Image Pymol Jmol Links: PDB, SCOP, CATH

Beta-lactamase ; ligands: CL,FMT,GOL,SO4 ; X-RAY DIFFRACTION 1.85Å

e6nlwB1[B:66-163] Image Pymol Jmol Links: PDB, SCOP, CATH

Beta-lactamase ; ligands: CL,FMT,GOL,PEG,SO4 ; X-RAY DIFFRACTION 1.85Å

e6nlwC2[C:66-163] Image Pymol Jmol Links: PDB, SCOP, CATH

Beta-lactamase ; ligands: CL,FMT,GOL,MLA,SO4 ; X-RAY DIFFRACTION 1.85Å

e6nlwD2[D:66-163] Image Pymol Jmol Links: PDB, SCOP, CATH

Beta-lactamase ; ligands: CL,FMT,GOL,SO4 ; X-RAY DIFFRACTION 1.85Å

e6nhuA2[A:56-160] Image Pymol Jmol Links: PDB, SCOP, CATH

Beta-lactamase ; ligands: GOL,PO4 ; X-RAY DIFFRACTION 2.3Å

e6nhuB2[B:56-160] Image Pymol Jmol Links: PDB, SCOP, CATH

Beta-lactamase ; ligands: EDO,PO4 ; X-RAY DIFFRACTION 2.3Å

e6nhuD1[D:56-160] Image Pymol Jmol Links: PDB, SCOP, CATH

Beta-lactamase ; ligands: EDO ; X-RAY DIFFRACTION 2.3Å

e6c84B2[B:418-544] Image Pymol Jmol Links: PDB, SCOP, CATH

Penicillin-binding protein ; X-RAY DIFFRACTION 2.510Å

e6c84A1[A:418-544] Image Pymol Jmol Links: PDB, SCOP, CATH

Penicillin-binding protein ; X-RAY DIFFRACTION 2.510Å

e6mpqA1[A:77-173] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-lactamase ; ligands: CL,JXG ; X-RAY DIFFRACTION 1.950Å

e6q5bA1[A:63-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-lactamase ; ligands: CL,CO2,NXL ; X-RAY DIFFRACTION 2.22Å

e6q5bC2[C:63-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-lactamase ; ligands: CO2,NXL ; X-RAY DIFFRACTION 2.22Å

e6q5bB1[B:63-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-lactamase ; ligands: CL,NXL ; X-RAY DIFFRACTION 2.22Å

e6q5bD2[D:63-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-lactamase ; ligands: NXL,SO4 ; X-RAY DIFFRACTION 2.22Å

e6q5fA2[A:63-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-lactamase ; ligands: CL,CTJ,PGE ; X-RAY DIFFRACTION 2.5Å

e6q5fC1[C:63-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-lactamase ; ligands: CTJ ; X-RAY DIFFRACTION 2.5Å

e6q5fB1[B:63-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-lactamase ; ligands: CL ; X-RAY DIFFRACTION 2.5Å

e6q5fD1[D:63-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-lactamase ; ligands: CL,SO4 ; X-RAY DIFFRACTION 2.5Å

e6g0kB3[B:418-544] Image Pymol Jmol Links: PDB, SCOP, CATH

Low affinity penicillin-binding protein 5 (PBP5) ; ligands: SO4 ; X-RAY DIFFRACTION 2.9Å

e6g0kA4[A:418-544] Image Pymol Jmol Links: PDB, SCOP, CATH

Low affinity penicillin-binding protein 5 (PBP5) ; ligands: SO4 ; X-RAY DIFFRACTION 2.9Å

e6g0kC2[C:418-544] Image Pymol Jmol Links: PDB, SCOP, CATH

Low affinity penicillin-binding protein 5 (PBP5) ; ligands: SO4 ; X-RAY DIFFRACTION 2.9Å

e6g88A2[A:418-544] Image Pymol Jmol Links: PDB, SCOP, CATH

Low affinity penicillin-binding protein 5 (PBP5) ; ligands: RB6,SO4 ; X-RAY DIFFRACTION 3.3Å

e6g88B5[B:418-544] Image Pymol Jmol Links: PDB, SCOP, CATH

Low affinity penicillin-binding protein 5 (PBP5) ; ligands: RB6,SO4 ; X-RAY DIFFRACTION 3.3Å

e6g88C1[C:418-544] Image Pymol Jmol Links: PDB, SCOP, CATH

Low affinity penicillin-binding protein 5 (PBP5) ; ligands: RB6,SO4 ; X-RAY DIFFRACTION 3.3Å

e6rj7B2[B:63-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-lactamase ; X-RAY DIFFRACTION 1.73Å

e6rj7A2[A:63-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-lactamase ; ligands: CA ; X-RAY DIFFRACTION 1.73Å

e6p98A1[A:63-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-lactamase ; ligands: CL,KE1 ; X-RAY DIFFRACTION 1.75Å

e6p96A2[A:63-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-lactamase ; ligands: CA,CD,CL ; X-RAY DIFFRACTION 1.6Å

e6p96B2[B:63-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-lactamase ; ligands: CL ; X-RAY DIFFRACTION 1.6Å

e6p97A2[A:63-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-lactamase ; ligands: CA,CL,IM2 ; X-RAY DIFFRACTION 1.8Å

e6p97B1[B:63-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-lactamase ; ligands: CA,CD,CL,IM2 ; X-RAY DIFFRACTION 1.8Å

e6p98B1[B:63-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-lactamase ; ligands: CA,CD,CL,KE1 ; X-RAY DIFFRACTION 1.75Å

e6p99A2[A:63-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-lactamase ; ligands: 1RG,CA,CD,CL ; X-RAY DIFFRACTION 2.25Å

e6p99B1[B:63-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-lactamase ; ligands: CL ; X-RAY DIFFRACTION 2.25Å

e6p9cA1[A:63-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-lactamase ; ligands: 4J6,CA,CL ; X-RAY DIFFRACTION 1.9Å

e6p9cB1[B:63-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-lactamase ; ligands: 4J6,CA,CD,CL ; X-RAY DIFFRACTION 1.9Å

e6h5oA3[A:399-417,A:457-524] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Penicillin binding protein 2 prime ; ligands: JPP ; X-RAY DIFFRACTION 2.82Å

e6h5oB5[B:399-524] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Penicillin binding protein 2 prime ; ligands: JPP ; X-RAY DIFFRACTION 2.82Å

e6rtnB2[B:62-159] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-lactamase OXA-10 ; ligands: CL,KJK ; X-RAY DIFFRACTION 2.170Å

e6skpB2[B:63-160] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-lactamase ; ligands: IM2 ; X-RAY DIFFRACTION 1.891Å

e6skpA2[A:63-160] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-lactamase ; ligands: IM2,NA ; X-RAY DIFFRACTION 1.891Å

e6skqA1[A:63-160] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-lactamase ; ligands: MER,SO4 ; X-RAY DIFFRACTION 2.10Å

e6skqB1[B:63-160] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-lactamase ; ligands: MER,SO4 ; X-RAY DIFFRACTION 2.10Å

e6skqC1[C:63-160] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-lactamase ; ligands: MER ; X-RAY DIFFRACTION 2.10Å

e6skqD2[D:63-160] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-lactamase ; ligands: MER ; X-RAY DIFFRACTION 2.10Å

e6rtnA1[A:62-159] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-lactamase OXA-10 ; ligands: CL,KJK ; X-RAY DIFFRACTION 2.170Å

e6skrA1[A:62-159] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-lactamase ; ligands: 1RG,MG ; X-RAY DIFFRACTION 1.85Å

e6skrB1[B:62-159] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-lactamase ; ligands: 1RG,FMT ; X-RAY DIFFRACTION 1.85Å

e6hb8A2[A:63-163] Image Pymol Jmol Links: PDB, SCOP, CATH

Beta-lactamase ; ligands: ETX,GOL,SO4 ; X-RAY DIFFRACTION 1.86Å

e6hb8B2[B:63-163] Image Pymol Jmol Links: PDB, SCOP, CATH

Beta-lactamase ; ligands: EDO,GOL,SO4 ; X-RAY DIFFRACTION 1.86Å

e6hb8C2[C:63-163] Image Pymol Jmol Links: PDB, SCOP, CATH

Beta-lactamase ; ligands: GOL,SO4 ; X-RAY DIFFRACTION 1.86Å

e6hb8D1[D:63-163] Image Pymol Jmol Links: PDB, SCOP, CATH

Beta-lactamase ; ligands: EDO,GOL,SO4 ; X-RAY DIFFRACTION 1.86Å

e6hooA2[A:63-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-lactamase,OXA-48loop18,Beta-lactamase ; ligands: GOL,SO4 ; X-RAY DIFFRACTION 2.38Å

e6pxxB1[B:63-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-lactamase ; ligands: 5R7,CL,EDO,EPE ; X-RAY DIFFRACTION 1.500Å

e6hooB2[B:63-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-lactamase,OXA-48loop18,Beta-lactamase ; ligands: F,GOL,SO4 ; X-RAY DIFFRACTION 2.38Å

e6pxxA1[A:63-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-lactamase ; ligands: 5R7,EDO ; X-RAY DIFFRACTION 1.500Å

e6huhA2[A:47-152] Image Pymol Jmol Links: PDB, SCOP, CATH

Beta-lactamase ; ligands: SO4 ; X-RAY DIFFRACTION 2.776Å

e6huhB2[B:47-152] Image Pymol Jmol Links: PDB, SCOP, CATH

Beta-lactamase ; ligands: SO4 ; X-RAY DIFFRACTION 2.776Å

e6q9nA3[A:399-524] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Penicillin binding protein 2 prime ; ligands: JPP ; X-RAY DIFFRACTION 2.5Å

e6q9nB1[B:399-524] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Penicillin binding protein 2 prime ; X-RAY DIFFRACTION 2.5Å

e6v6nA1[A:55-159] Image Pymol Jmol Links: PDB, SCOP, CATH

Beta-lactamase ; ligands: GOL ; X-RAY DIFFRACTION 1.85Å

e6v6nB2[B:55-159] Image Pymol Jmol Links: PDB, SCOP, CATH

Beta-lactamase ; ligands: GOL ; X-RAY DIFFRACTION 1.85Å

e6v6nC1[C:55-159] Image Pymol Jmol Links: PDB, SCOP, CATH

Beta-lactamase ; ligands: GOL,SO4 ; X-RAY DIFFRACTION 1.85Å

e6v6nD1[D:55-159] Image Pymol Jmol Links: PDB, SCOP, CATH

Beta-lactamase ; ligands: GOL ; X-RAY DIFFRACTION 1.85Å

e6pk0A2[A:63-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

OXA family beta-lactamase ; ligands: GOL,HIW ; X-RAY DIFFRACTION 1.750Å

e6pk0B2[B:63-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

OXA family beta-lactamase ; ligands: GOL,HIW ; X-RAY DIFFRACTION 1.750Å

e6pk0C2[C:63-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

OXA family beta-lactamase ; ligands: GOL,HIW ; X-RAY DIFFRACTION 1.750Å

e6pk0D2[D:63-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

OXA family beta-lactamase ; ligands: HIW ; X-RAY DIFFRACTION 1.750Å

e6pqiA2[A:63-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Class D Carbapenemase OXA-48 ; ligands: ACT,CEF,CL ; X-RAY DIFFRACTION 2.04Å

e6pqiB2[B:63-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Class D Carbapenemase OXA-48 ; ligands: CEF,CL ; X-RAY DIFFRACTION 2.04Å

e6pqiC2[C:63-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Class D Carbapenemase OXA-48 ; ligands: ACT,CEF,CL ; X-RAY DIFFRACTION 2.04Å

e6pqiD1[D:63-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Class D Carbapenemase OXA-48 ; ligands: ACT,CEF,CL ; X-RAY DIFFRACTION 2.04Å

e6psgA2[A:63-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Class D Carbapenemase OXA-48 ; ligands: DGF ; X-RAY DIFFRACTION 2.1210Å

e6psgB2[B:63-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Class D Carbapenemase OXA-48 ; ligands: DGF ; X-RAY DIFFRACTION 2.1210Å

e6psgC1[C:63-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Class D Carbapenemase OXA-48 ; ligands: DGF,GOL ; X-RAY DIFFRACTION 2.1210Å

e6psgD2[D:63-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Class D Carbapenemase OXA-48 ; ligands: DGF ; X-RAY DIFFRACTION 2.1210Å

e6pt1A1[A:63-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Class D Carbapenemase OXA-48 ; ligands: CL,MER ; X-RAY DIFFRACTION 1.9980Å

e6pt1B2[B:63-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Class D Carbapenemase OXA-48 ; ligands: CL,MER ; X-RAY DIFFRACTION 1.9980Å

e6pt1C1[C:63-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Class D Carbapenemase OXA-48 ; ligands: CL,GOL,MER ; X-RAY DIFFRACTION 1.9980Å

e6pt1D2[D:63-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Class D Carbapenemase OXA-48 ; ligands: CL,GOL,MER ; X-RAY DIFFRACTION 1.9980Å

e6pt5A2[A:63-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Class D Carbapenemase OXA-48 ; ligands: 1S7 ; X-RAY DIFFRACTION 2.300Å

e6pt5B1[B:63-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Class D Carbapenemase OXA-48 ; ligands: 1S7 ; X-RAY DIFFRACTION 2.300Å

e6pt5C2[C:63-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Class D Carbapenemase OXA-48 ; ligands: 1S7 ; X-RAY DIFFRACTION 2.300Å

e6pt5D1[D:63-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Class D Carbapenemase OXA-48 ; ligands: 1S7 ; X-RAY DIFFRACTION 2.300Å

e6ptuA2[A:63-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Class D Carbapenemase OXA-48 ; ligands: CL,ID1 ; X-RAY DIFFRACTION 2.000Å

e6ptuB1[B:63-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Class D Carbapenemase OXA-48 ; ligands: CL,ID1 ; X-RAY DIFFRACTION 2.000Å

e6ptuC1[C:63-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Class D Carbapenemase OXA-48 ; ligands: CL,ID1 ; X-RAY DIFFRACTION 2.000Å

e6ptuD2[D:63-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Class D Carbapenemase OXA-48 ; ligands: CL,ID1 ; X-RAY DIFFRACTION 2.000Å

e6nz8A2[A:77-173] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-lactamase OXA-231 ; ligands: CL,NA ; X-RAY DIFFRACTION 1.2Å

e6i5dA1[A:63-163] Image Pymol Jmol Links: PDB, SCOP, CATH

Beta-lactamase ; ligands: EDO,GOL,NO3,PEG ; X-RAY DIFFRACTION 1.75Å

e6i5dB2[B:63-163] Image Pymol Jmol Links: PDB, SCOP, CATH

Beta-lactamase ; ligands: GOL,NO3,PO4 ; X-RAY DIFFRACTION 1.75Å

e6v1oC1[C:63-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

OXA family beta-lactamase ; ligands: MG,RM9 ; X-RAY DIFFRACTION 1.800Å

e6v1oA2[A:63-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

OXA family beta-lactamase ; ligands: MG,RM9 ; X-RAY DIFFRACTION 1.800Å

e6v1oB1[B:63-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

OXA family beta-lactamase ; ligands: MG,RM9 ; X-RAY DIFFRACTION 1.800Å

e6v1oD1[D:63-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

OXA family beta-lactamase ; ligands: MG,RM9 ; X-RAY DIFFRACTION 1.800Å

e6whlA1[A:45-150] Image Pymol Jmol Links: PDB, SCOP, CATH

Beta-lactamase ; X-RAY DIFFRACTION 2.30Å

e6whlB2[B:45-150] Image Pymol Jmol Links: PDB, SCOP, CATH

Beta-lactamase ; X-RAY DIFFRACTION 2.30Å

e6whlC2[C:45-150] Image Pymol Jmol Links: PDB, SCOP, CATH

Beta-lactamase ; X-RAY DIFFRACTION 2.30Å

e6whlD1[D:45-150] Image Pymol Jmol Links: PDB, SCOP, CATH

Beta-lactamase ; X-RAY DIFFRACTION 2.30Å

e6whlE1[E:45-150] Image Pymol Jmol Links: PDB, SCOP, CATH

Beta-lactamase ; X-RAY DIFFRACTION 2.30Å

e6whlF1[F:45-150] Image Pymol Jmol Links: PDB, SCOP, CATH

Beta-lactamase ; X-RAY DIFFRACTION 2.30Å

e6whlG2[G:45-150] Image Pymol Jmol Links: PDB, SCOP, CATH

Beta-lactamase ; X-RAY DIFFRACTION 2.30Å

e6whlH1[H:45-150] Image Pymol Jmol Links: PDB, SCOP, CATH

Beta-lactamase ; X-RAY DIFFRACTION 2.30Å

e6whlI1[I:45-150] Image Pymol Jmol Links: PDB, SCOP, CATH

Beta-lactamase ; X-RAY DIFFRACTION 2.30Å

e6whlJ2[J:45-150] Image Pymol Jmol Links: PDB, SCOP, CATH

Beta-lactamase ; X-RAY DIFFRACTION 2.30Å

e6whlK1[K:45-150] Image Pymol Jmol Links: PDB, SCOP, CATH

Beta-lactamase ; X-RAY DIFFRACTION 2.30Å

e6whlL1[L:45-150] Image Pymol Jmol Links: PDB, SCOP, CATH

Beta-lactamase ; X-RAY DIFFRACTION 2.30Å

e6uvkA2[A:63-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Beta-lactamase ; ligands: GOL,QHY ; X-RAY DIFFRACTION 2.2Å

e6xj3A2[A:67-164] Image Pymol Jmol Links: PDB, SCOP, CATH

Beta-lactamase ; ligands: EDO,NXL ; X-RAY DIFFRACTION 1.850Å

e6xj3B1[B:67-164] Image Pymol Jmol Links: PDB, SCOP, CATH

Beta-lactamase ; ligands: EDO,NXL,PEG ; X-RAY DIFFRACTION 1.850Å

e6xj3C1[C:67-164] Image Pymol Jmol Links: PDB, SCOP, CATH

Beta-lactamase ; ligands: NXL ; X-RAY DIFFRACTION 1.850Å

e6xj3D2[D:67-164] Image Pymol Jmol Links: PDB, SCOP, CATH

Beta-lactamase ; ligands: NXL ; X-RAY DIFFRACTION 1.850Å

e6o9wA2[A:385-407,A:428-480] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Regulatory protein BlaR1 ; ligands: NXL ; X-RAY DIFFRACTION 1.950Å

e6o9wB1[B:385-480] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Regulatory protein BlaR1 ; ligands: NXL ; X-RAY DIFFRACTION 1.950Å

Previous Next

e1xa1A1[A:56-151] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

REGULATORY PROTEIN BLAR1 ; ligands: PO4,POP ; X-RAY DIFFRACTION 1.8Å

e5crfA2[A:342-455] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Penicillin-binding protein 1A ; ligands: PO4 ; X-RAY DIFFRACTION 1.8Å

e2bg1A1[A:457-561] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

PENICILLIN-BINDING PROTEIN 1B ; X-RAY DIFFRACTION 1.900Å

e4r1gA3[A:679-808] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH

Peptidoglycan glycosyltransferase ; ligands: CXU ; X-RAY DIFFRACTION 1.92Å

e3zg8B3[B:391-493] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

PENICILLIN-BINDING PROTEIN 4 ; ligands: AIX,GOL ; X-RAY DIFFRACTION 2.09Å

e2waeA4[A:383-522] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

PENICILLIN-BINDING PROTEIN 2B ; X-RAY DIFFRACTION 2.26Å

e3oclA3[A:291-411] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

PENICILLIN-BINDING PROTEIN 3 ; ligands: CB9,CL ; X-RAY DIFFRACTION 2.3Å

e1pyyA2[A:334-455] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Penicillin-binding protein 2X ; ligands: OSU,SO4 ; X-RAY DIFFRACTION 2.42Å

e1nrfA1[A:399-494] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

REGULATORY PROTEIN BLAR1 ; X-RAY DIFFRACTION 2.44Å

e2c5wB1[B:367-470] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

PENICILLIN-BINDING PROTEIN 1A ; ligands: CL,EDO,PCZ,ZN ; X-RAY DIFFRACTION 2.550Å

e5u2gA4[A:450-551] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH

Penicillin-binding protein 1A ; ligands: SO4 ; X-RAY DIFFRACTION 2.60Å

e2oluA1[A:395-502] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

PENICILLIN-BINDING PROTEIN 2 ; X-RAY DIFFRACTION 2.9Å

e4oonA1[A:458-563] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Penicillin-binding protein 1A ; ligands: 2U4 ; X-RAY DIFFRACTION 3.2Å

F: Unmapped domains

Pseudo group of domains that do not map to PFam family profiles. Domains inside should not be considered as in one family.

beta barrelssingle beta-sheet folded upon itself to form a barrel

beta meanderssingle beta-sheet with mainly meander topology

beta sandwichestwo beta-sheets stacked together to form a sandwich

beta duplicates or obligate multimersbeta duplicates or monomers associate together to form a compact domain

beta complex topologybeta domains with complex and unique topology that cannot be described as barrel or sandwich or meander

a+b two layersone alpha-helix layer and one beta-sheet layer

a+b three layersone mainly antiparallel beta-sheet layer sandwiched between two alpha-helix layers

a+b four layerstwo beta-sheet layers sandwiched between two alpha-helix layers

a+b complex topologyalpha and beta domain with complex and unique topology that cannot be described in layers

a+b duplicates or obligate multimersalpha and beta duplicates or monomers associated together to form a compact domain

a/b barrelsrepeating beta-alpha units form a barrel

a/b three-layered sandwichesrepeating beta-alpha units form a sandwich with a mainly parallel beta-sheet layer stacked between two alpha-helix layers

mixed a+b and a/balpha and beta domain consists of both a+b and a/b regions

few secondary structure elementsstabilized by cofactors or disulfides

extended segmentsextended, non-globular segments, frequently bind to other proteins to form complexes