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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

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

X: Periplasmic binding protein-like II
H: Periplasmic binding protein-like II
T: Periplasmic binding protein-like II
F: TctC

PF03401 CL0177

Representatives:

e2f5xA1[A:2-98,A:226-300] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

BUGD ; ligands: ASP ; X-RAY DIFFRACTION 1.72Å

e2dvzA2[A:15-109,A:242-314] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

PUTATIVE EXPORTED PROTEIN ; ligands: GLU ; X-RAY DIFFRACTION 2.3Å

e2f5xB2[B:1-97,B:225-300] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

BUGD ; ligands: ASP ; X-RAY DIFFRACTION 1.72Å

e2qpqB2[B:5-100,B:228-301] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

PROTEIN BUG27 ; X-RAY DIFFRACTION 1.92Å

e4x9tA2[A:27-121,A:246-314] Image Pymol Jmol Links: PDB, SCOP, CATH

Uncharacterized protein UPF0065 ; ligands: CL ; X-RAY DIFFRACTION 1.240Å

e2f5xC2[C:2-97,C:225-300] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

BUGD ; ligands: ASP ; X-RAY DIFFRACTION 1.72Å

e2qpqA2[A:6-100,A:228-301] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

PROTEIN BUG27 ; ligands: CIT ; X-RAY DIFFRACTION 1.92Å

e2qpqC2[C:6-100,C:228-301] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

PROTEIN BUG27 ; ligands: CIT ; X-RAY DIFFRACTION 1.92Å

e5oeiA2[A:36-133,A:261-334] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Uncharacterized protein family UPF0065:Tat pathway signal ; ligands: GOL,OOG,SO4 ; X-RAY DIFFRACTION 1.78Å

e5okuA1[A:36-133,A:261-334] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Uncharacterized protein family UPF0065:Tat pathway signal ; ligands: 0L1,GOL,SO4 ; X-RAY DIFFRACTION 2.07Å

e6hkeB1[B:13-109,B:237-308] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Possible TctC subunit of the Tripartite Tricarboxylate Transport(TTT) Family ; ligands: LMR ; X-RAY DIFFRACTION 2.11Å

e6hkeA1[A:13-109,A:237-306] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Possible TctC subunit of the Tripartite Tricarboxylate Transport(TTT) Family ; ligands: LMR,MLT ; X-RAY DIFFRACTION 2.11Å

e6hkeC2[C:13-109,C:237-307] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Possible TctC subunit of the Tripartite Tricarboxylate Transport(TTT) Family ; ligands: LMR,MLT ; X-RAY DIFFRACTION 2.11Å

e7ndrA1[A:21-114,A:242-314] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Tripartite tricarboxylate transporter substrate binding protein ; X-RAY DIFFRACTION 1.88Å

e7ndrB1[B:20-114,B:242-312] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Tripartite tricarboxylate transporter substrate binding protein ; X-RAY DIFFRACTION 1.88Å

e7ndrC1[C:21-114,C:242-312] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Tripartite tricarboxylate transporter substrate binding protein ; X-RAY DIFFRACTION 1.88Å

e7ndrD1[D:20-114,D:242-312] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Tripartite tricarboxylate transporter substrate binding protein ; ligands: EDO ; X-RAY DIFFRACTION 1.88Å

e7ndrE1[E:21-114,E:242-312] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Tripartite tricarboxylate transporter substrate binding protein ; X-RAY DIFFRACTION 1.88Å

e7ndrF1[F:20-114,F:242-312] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Tripartite tricarboxylate transporter substrate binding protein ; X-RAY DIFFRACTION 1.88Å

e7ndsA1[A:28-122,A:250-321] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Tripartite tricarboxylate transporter substrate binding protein ; ligands: UB7 ; X-RAY DIFFRACTION 2.4Å

e8hkbA2[A:27-121,A:249-328] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

; ligands: UB7 ; X-RAY DIFFRACTION 1.40Å

e2f5xA2[A:99-225] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

BUGD ; ligands: ASP ; X-RAY DIFFRACTION 1.72Å

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.

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