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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

X: cradle loop barrel

Refs: Structure 14, 1489-1498; Current opinion in structural biology 18, 358-365

H: RIFT-related
T: acid protease

126354, 3-crossover-4

F: RVP

PF00077 CL0129

Representatives:

e2nmzA1[A:1-99] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

PROTEASE ; ligands: ROC,SO4 ; X-RAY DIFFRACTION 0.97Å

e2aohA1[A:1-99] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

POL POLYPROTEIN ; ligands: NA ; X-RAY DIFFRACTION 1.42Å

e1kjfA1[A:1-99] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

POL POLYPROTEIN ; ligands: ACT ; X-RAY DIFFRACTION 2.000Å

e1hvkB1[B:1-99] Image Pymol Jmol Links: PDB, SCOP, CATH

HIV-1 PROTEASE ; ligands: A79 ; X-RAY DIFFRACTION 1.8Å

e1hviA1[A:1-99] Image Pymol Jmol Links: PDB, SCOP, CATH

HIV-1 PROTEASE ; ligands: A77 ; X-RAY DIFFRACTION 1.8Å

e2pk5A1[A:1-99] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Protease ; ligands: 075,GOL ; X-RAY DIFFRACTION 1.900Å

e1ebwA1[A:1-99] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

HIV-1 PROTEASE ; ligands: BEI ; X-RAY DIFFRACTION 1.81Å

e1d4yA1[A:1-99] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

PROTEIN (HIV-1 PROTEASE) ; ligands: TPV ; X-RAY DIFFRACTION 1.97Å

e2hpfB1[B:1-99] Image Pymol Jmol Links: PDB, SCOP, CATH

HIV-2 PROTEASE ; X-RAY DIFFRACTION 3.0Å

e1dazC1[C:1-99] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

HIV-1 PROTEASE (RETROPEPSIN) ; ligands: 0Q4 ; X-RAY DIFFRACTION 1.55Å

e2aofA1[A:1-99] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

POL POLYPROTEIN ; ligands: CL,NA ; X-RAY DIFFRACTION 1.32Å

e2bpxA1[A:1-99] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

HIV-1 PROTEASE ; ligands: MK1 ; X-RAY DIFFRACTION

e1zsfA1[A:1-99] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

PROTEASE RETROPEPSIN ; ligands: 0ZS ; X-RAY DIFFRACTION 1.98Å

e1hpoB1[B:1-99] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

HIV-1 PROTEASE ; ligands: UNI ; X-RAY DIFFRACTION 2.5Å

e2qmpA1[A:1-99] Image Pymol Jmol Links: PDB, SCOP, CATH

Pol polyprotein ; ligands: A00 ; X-RAY DIFFRACTION 1.800Å

e2aoeB1[B:101-199] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

POL POLYPROTEIN ; ligands: 0Q4,CL,GOL ; X-RAY DIFFRACTION 1.54Å

e2cejA1[A:1-99] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

POL PROTEIN ; ligands: 1AH ; X-RAY DIFFRACTION 2.5Å

e1d4kB1[B:1-99] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

HIV-1 PROTEASE ; ligands: PI8 ; X-RAY DIFFRACTION 1.85Å

e1t7kB1[B:1-99] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Pol polyprotein [Contains: Protease (Retropepsin)] ; ligands: BH0 ; X-RAY DIFFRACTION 2.10Å

e1dw6C1[C:1-99] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

HIV-1 PROTEASE ; ligands: 0Q4 ; X-RAY DIFFRACTION 1.8Å

e1ivqA1[A:1-99] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed,

HIV-2 PROTEASE ; ligands: 0PX ; X-RAY DIFFRACTION

e1hwrB1[B:1-99] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

HIV-1 PROTEASE ; ligands: 216 ; X-RAY DIFFRACTION

e2nphB1[B:1001-1099] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

PROTEASE RETROPEPSIN ; X-RAY DIFFRACTION 1.650Å

e1tsqB1[B:1-99] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Pol polyprotein ; ligands: ACT ; X-RAY DIFFRACTION 2.0Å

e2ieoB1[B:101-199] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Protease ; ligands: 017,CL ; X-RAY DIFFRACTION 1.530Å

e1aaqA1[A:1-99] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

HIV-1 PROTEASE ; ligands: PSI ; X-RAY DIFFRACTION

e3djkA1[A:1-99] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Protease ; ligands: CL,G55,NA ; X-RAY DIFFRACTION 1.00Å

e1ivpA1[A:1-99] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed,

HIV-2 PROTEASE ; ligands: 1ZK ; X-RAY DIFFRACTION

e2nnkB1[B:101-199] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

PROTEASE ; ligands: CL,GOL,NA,ROC ; X-RAY DIFFRACTION 1.25Å

e1htfB1[B:1-99] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

HIV-1 PROTEASE ; ligands: G26 ; X-RAY DIFFRACTION

e2bpwA1[A:1-99] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

HIV-1 PROTEASE ; ligands: 1IN ; X-RAY DIFFRACTION

e2nnpA1[A:1-99] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

PROTEASE ; ligands: ACY,GOL,ROC ; X-RAY DIFFRACTION 1.20Å

e1wbkA1[A:1-99] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

POL PROTEIN (FRAGMENT) ; ligands: 568 ; X-RAY DIFFRACTION 2.000Å

e8hvpB1[B:1-99] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

HIV-1 PROTEASE ; X-RAY DIFFRACTION

e1msmB1[B:1-99] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

POL polyprotein ; ligands: JE2 ; X-RAY DIFFRACTION 2.0Å

e1hegE1[E:1-99] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed,

HIV-1 PROTEASE ; ligands: PSI ; X-RAY DIFFRACTION

e1htgB1[B:1-99] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

HIV-1 PROTEASE ; ligands: G37 ; X-RAY DIFFRACTION

e1rv7A1[A:1-99] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

protease ; ligands: AB1 ; X-RAY DIFFRACTION 2.7Å

e1vikA1[A:1-99] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

HIV-1 PROTEASE ; ligands: BAY ; X-RAY DIFFRACTION

e1ebkF1[F:101-199] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

HIV-1 PROTEASE ; ligands: 0Q4 ; X-RAY DIFFRACTION

e2pk5B1[B:1-99] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Protease ; ligands: 075 ; X-RAY DIFFRACTION 1.900Å

e2pwrA1[A:1-99] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Gag-Pol polyprotein (Pr160Gag-Pol) ; ligands: CL,G4G ; X-RAY DIFFRACTION 1.50Å

e1rpiA1[A:1-99] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

protease ; ligands: GLC ; X-RAY DIFFRACTION 1.86Å

e1t7kA1[A:1-99] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Pol polyprotein [Contains: Protease (Retropepsin)] ; ligands: BH0 ; X-RAY DIFFRACTION 2.10Å

e1hiiA1[A:1-99] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

HIV-2 PROTEASE ; ligands: C20,SO4 ; X-RAY DIFFRACTION

e1hpsB1[B:1-99] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

HIV-1 PROTEASE ; ligands: RUN ; X-RAY DIFFRACTION

e1hpoA1[A:1-99] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

HIV-1 PROTEASE ; ligands: UNI ; X-RAY DIFFRACTION 2.5Å

e3bgcB1[B:1-99] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

PROTEASE ; ligands: CL,LJH ; X-RAY DIFFRACTION 1.8Å

e2bpxB1[B:1-99] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

HIV-1 PROTEASE ; ligands: MK1 ; X-RAY DIFFRACTION

e2bbbA1[A:1-99] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

PROTEASE ; ligands: HH1 ; X-RAY DIFFRACTION 1.7Å

e1kj4D1[D:1-99] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

POL polyprotein ; ligands: ACT ; X-RAY DIFFRACTION 2.900Å

e1d4jA1[A:1-99] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

HIV-1 PROTEASE ; ligands: MSC ; X-RAY DIFFRACTION 1.81Å

e1a94E1[E:1-99] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

PROTEASE ; ligands: 0Q4 ; X-RAY DIFFRACTION 2.0Å

e1ythB1[B:1-99] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

HIV PROTEASE ; X-RAY DIFFRACTION

e1zpkA1[A:1-99] Image Pymol Jmol Links: PDB, SCOP, CATH

PROTEASE RETROPEPSIN ; ligands: 0ZS ; X-RAY DIFFRACTION 1.65Å

e1k1tB1[B:101-199] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

PROTEASE RETROPEPSIN ; ligands: 0Q4,SO4 ; X-RAY DIFFRACTION 1.2Å

e1tcwA1[A:1-99] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

SIV PROTEASE ; ligands: IM1 ; X-RAY DIFFRACTION

e1mtrA1[A:1-99] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed,

HIV-1 PROTEASE ; ligands: PI6,SO4 ; X-RAY DIFFRACTION 1.75Å

e1idbA1[A:1-99] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Protease ; ligands: 0DO ; X-RAY DIFFRACTION

e1sbgB1[B:1-99] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

HIV-1 PROTEASE ; ligands: IM1 ; X-RAY DIFFRACTION

e1hvsA1[A:1-99] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

HIV-1 PROTEASE ; ligands: A77 ; X-RAY DIFFRACTION 2.25Å

e1zbgB1[B:101-199] Image Pymol Jmol Links: PDB, SCOP, CATH

PROTEASE RETROPEPSIN ; ligands: 0ZS,CL,NA ; X-RAY DIFFRACTION 1.995Å

e1bv9A1[A:1-99] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

PROTEIN (HIV-1 PROTEASE) ; ligands: XV6 ; X-RAY DIFFRACTION 1.9Å

e1iziA1[A:1-99] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

proteinase ; ligands: CL,Q50 ; X-RAY DIFFRACTION 2.15Å

e1ajvA1[A:1-99] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

HIV-1 PROTEASE ; ligands: NMB ; X-RAY DIFFRACTION 2.0Å

e1hvhA1[A:1-99] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

HIV-1 PROTEASE ; ligands: Q82 ; X-RAY DIFFRACTION

e1hwrA1[A:1-99] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

HIV-1 PROTEASE ; ligands: 216 ; X-RAY DIFFRACTION

e1hbvB1[B:1-99] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

HIV-1 PROTEASE ; ligands: GAN ; X-RAY DIFFRACTION 2.3Å

e3ebzB1[B:101-199] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

PROTEASE ; ligands: 017,CL,IMD,ZN ; X-RAY DIFFRACTION 1.2Å

e1t7jA1[A:1-99] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Pol Polyprotein ; ligands: 478,ACT ; X-RAY DIFFRACTION 2.2Å

e1c6yA1[A:1-99] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

PROTEIN (PROTEASE) ; ligands: MK1 ; X-RAY DIFFRACTION 2.5Å

e1c6zA1[A:1-99] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

PROTEIN (PROTEASE) ; ligands: ROC ; X-RAY DIFFRACTION 2.5Å

e1iiqB1[B:1-99] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

PROTEASE RETROPEPSIN ; ligands: 0ZR,GOL ; X-RAY DIFFRACTION 1.83Å

e1ec2A1[A:1-99] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

HIV-1 PROTEASE ; ligands: BEJ ; X-RAY DIFFRACTION 2.00Å

e1w5vB1[B:1-99] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

HIV-1 PROTEASE ; ligands: BE3 ; X-RAY DIFFRACTION 1.800Å

e1hpvA1[A:1-99] Image Pymol Jmol Links: PDB, SCOP, CATH

HIV-1 PROTEASE ; ligands: 478 ; X-RAY DIFFRACTION 1.9Å

e1dw6D1[D:101-199] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

HIV-1 PROTEASE ; ligands: 0Q4 ; X-RAY DIFFRACTION 1.8Å

e3hvpA1[A:1-99] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed,

UNLIGANDED HIV-1 PROTEASE ; X-RAY DIFFRACTION

e1mrxB1[B:1-99] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

POL polyprotein ; ligands: K57 ; X-RAY DIFFRACTION 2.0Å

e1muiA1[A:1-99] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

protease ; ligands: AB1 ; X-RAY DIFFRACTION 2.8Å

e2hpfA1[A:1-99] Image Pymol Jmol Links: PDB, SCOP, CATH

HIV-2 PROTEASE ; X-RAY DIFFRACTION 3.0Å

e1hefE1[E:1-99] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed,

HIV-1 PROTEASE ; X-RAY DIFFRACTION

e1hvjB1[B:1-99] Image Pymol Jmol Links: PDB, SCOP, CATH

HIV-1 PROTEASE ; ligands: A78 ; X-RAY DIFFRACTION 2.0Å

e1hshB1[B:1-99] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed,

HIV-1 PROTEASE ; ligands: MK1 ; X-RAY DIFFRACTION 1.9Å

e2o4pA1[A:1-99] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

protease ; ligands: GOL,TPV ; X-RAY DIFFRACTION 1.80Å

e1vijA1[A:1-99] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

HIV-1 PROTEASE ; ligands: BAY ; X-RAY DIFFRACTION

e1aidB1[B:1-99] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed,

HUMAN IMMUNODEFICIENCY VIRUS PROTEASE ; ligands: CL,THK ; X-RAY DIFFRACTION 2.2Å

e2aidA1[A:1-99] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed,

HUMAN IMMUNODEFICIENCY VIRUS PROTEASE ; ligands: CL,THK ; X-RAY DIFFRACTION 1.9Å

e1d4iA1[A:1-99] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

HIV-1 PROTEASE ; ligands: BEG ; X-RAY DIFFRACTION 1.81Å

e1sdvA1[A:1-99] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

PROTEASE RETROPEPSIN ; ligands: CL,MK1 ; X-RAY DIFFRACTION 1.4Å

e9hvpA1[A:1-99] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed,

HIV-1 Protease ; ligands: 0E9 ; X-RAY DIFFRACTION

e1qbrB1[B:1-99] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

HIV-1 PROTEASE ; ligands: XV6 ; X-RAY DIFFRACTION

e1hteB1[B:1-99] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

HIV-1 PROTEASE ; ligands: G23 ; X-RAY DIFFRACTION

e2qd7A1[A:1-99] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Protease ; ligands: 065,DMS,GOL,PO4 ; X-RAY DIFFRACTION 1.11Å

e4phvA1[A:1-99] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed,

HIV-1 PROTEASE ; ligands: VAC ; X-RAY DIFFRACTION

e1muiB1[B:1-99] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

protease ; ligands: AB1 ; X-RAY DIFFRACTION 2.8Å

e1hvlB1[B:1-99] Image Pymol Jmol Links: PDB, SCOP, CATH

HIV-1 PROTEASE ; ligands: A76 ; X-RAY DIFFRACTION 1.8Å

e1qbsA1[A:1-99] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

HIV-1 PROTEASE ; ligands: DMP ; X-RAY DIFFRACTION

e1fejC1[C:1-99] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

PROTEASE RETROPEPSIN ; ligands: 2NC ; X-RAY DIFFRACTION 1.7Å

e1t3rA1[A:1-99] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

protease RETROPEPSIN ; ligands: 017,PO4 ; X-RAY DIFFRACTION 1.20Å

e1kj7B1[B:1-99] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

POL POLYPROTEIN ; ligands: ACT ; X-RAY DIFFRACTION 2.0Å

e2qd7B1[B:101-199] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Protease ; ligands: 065,DMS,GOL,PO4 ; X-RAY DIFFRACTION 1.11Å

e1qbtA1[A:1-99] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

HIV-1 PROTEASE ; ligands: 146 ; X-RAY DIFFRACTION

e7upjA1[A:1-99] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

HIV-1 PROTEASE ; ligands: INU ; X-RAY DIFFRACTION 2.0Å

e1n49A1[A:1-99] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Protease ; ligands: RIT ; X-RAY DIFFRACTION 2.2Å

e1sduA1[A:1-99] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

protease RETROPEPSIN ; ligands: MK1,SO4 ; X-RAY DIFFRACTION 1.25Å

e1hihA1[A:1-99] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

HIV-1 PROTEASE ; ligands: BME,C20 ; X-RAY DIFFRACTION

e2aojB1[B:101-199] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

POL POLYPROTEIN ; ligands: DMS,GOL ; X-RAY DIFFRACTION 1.60Å

e1mtbB1[B:1-99] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

PROTEASE RETROPEPSIN ; ligands: DIQ,QNC ; X-RAY DIFFRACTION 2.50Å

e3djkB1[B:101-199] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Protease ; ligands: CL,G55,NA ; X-RAY DIFFRACTION 1.00Å

e1izhA1[A:1-99] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

PROTEINASE ; ligands: Q50 ; X-RAY DIFFRACTION 1.9Å

e1f7aB1[B:1-99] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

POL POLYPROTEIN ; ligands: ACT ; X-RAY DIFFRACTION 2.0Å

e1a94A1[A:1-99] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

PROTEASE ; ligands: 0Q4 ; X-RAY DIFFRACTION 2.0Å

e3aidB1[B:1-99] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

HUMAN IMMUNODEFICIENCY VIRUS PROTEASE ; ligands: ARQ ; X-RAY DIFFRACTION 2.5Å

e1lzqB1[B:101-199] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

PROTEASE RETROPEPSIN ; ligands: 0ZQ,BME ; X-RAY DIFFRACTION 2.20Å

e2f80A1[A:1-99] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

POL POLYPROTEIN ; ligands: 017,CL ; X-RAY DIFFRACTION 1.45Å

e3ecgA1[A:1-99] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

PROTEASE ; ligands: 065,CL,IMD,NA,ZN ; X-RAY DIFFRACTION 1.18Å

e1bwbA1[A:1-99] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

PROTEIN (HIV-1 PROTEASE) ; ligands: 146 ; X-RAY DIFFRACTION 1.8Å

e1rpiB1[B:1-99] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

protease ; X-RAY DIFFRACTION 1.86Å

e2aocA1[A:1-99] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

HIV-1 PROTEASE ; ligands: 2NC,CL,DMS,GOL,NA,UNX ; X-RAY DIFFRACTION 1.30Å

e1hivB1[B:1-99] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed,

HIV-1 PROTEASE ; ligands: 1ZK ; X-RAY DIFFRACTION

e3bgbA1[A:1-99] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

PROTEASE ; ligands: LJG ; X-RAY DIFFRACTION 1.9Å

e1b6lB1[B:101-199] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

RETROPEPSIN ; ligands: PI4,SO4 ; X-RAY DIFFRACTION 1.75Å

e1hshD1[D:1-99] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed,

HIV-1 PROTEASE ; ligands: MK1 ; X-RAY DIFFRACTION 1.9Å

e5upjB1[B:1-99] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

HIV-2 PROTEASE ; ligands: UIN ; X-RAY DIFFRACTION 2.3Å

e1a8kD1[D:1-99] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

HIV PROTEASE ; ligands: 0Q4 ; X-RAY DIFFRACTION 2.0Å

e1b6jB1[B:101-199] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

RETROPEPSIN ; ligands: SO4 ; X-RAY DIFFRACTION 1.85Å

e2aocB1[B:101-199] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

HIV-1 PROTEASE ; ligands: 2NC,CL,DMS,GOL ; X-RAY DIFFRACTION 1.30Å

e2nnpB1[B:101-199] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

PROTEASE ; ligands: ACY,GOL,ROC,SO4 ; X-RAY DIFFRACTION 1.20Å

e2z4oB1[B:101-199] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Protease ; ligands: 065,ACT,CL ; X-RAY DIFFRACTION 1.6Å

e1sdvB1[B:101-199] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

PROTEASE RETROPEPSIN ; ligands: CL,MK1 ; X-RAY DIFFRACTION 1.4Å

e1bv7A1[A:1-99] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

PROTEIN (HIV-1 PROTEASE) ; ligands: XV6 ; X-RAY DIFFRACTION 2.0Å

e1w5yB1[B:1-99] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

POL POLYPROTEIN ; ligands: BE6 ; X-RAY DIFFRACTION 1.900Å

e2o4kA1[A:1-99] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

protease ; ligands: CL,DR7 ; X-RAY DIFFRACTION 1.600Å

e1fejD1[D:101-199] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

PROTEASE RETROPEPSIN ; ligands: 2NC ; X-RAY DIFFRACTION 1.7Å

e2hb3B1[B:1-99] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Protease ; ligands: CL,GOL,GRL,NA ; X-RAY DIFFRACTION 1.35Å

e1mtrB1[B:1-99] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed,

HIV-1 PROTEASE ; ligands: PI6,SO4 ; X-RAY DIFFRACTION 1.75Å

e1fg6C1[C:1-99] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

PROTEASE RETROPEPSIN ; ligands: 2NC ; X-RAY DIFFRACTION 1.80Å

e2aogB1[B:101-199] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

HIV-1 PROTEASE (RETROPEPSIN) ; ligands: 2NC,GOL,UNX ; X-RAY DIFFRACTION 1.10Å

e1ebkD1[D:101-199] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

HIV-1 PROTEASE ; ligands: 0Q4 ; X-RAY DIFFRACTION

e5hvpA1[A:1-99] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed,

HIV-1 PROTEASE ; ligands: CL ; X-RAY DIFFRACTION

e1kjgA1[A:1-99] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

POL POLYPROTEIN ; ligands: ACT ; X-RAY DIFFRACTION 2.000Å

e2o4sB1[B:1-99] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

protease ; ligands: AB1,CL,GOL ; X-RAY DIFFRACTION 1.540Å

e1kj4C1[C:1-99] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

POL polyprotein ; ligands: ACT ; X-RAY DIFFRACTION 2.900Å

e2a4fA1[A:1-99] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Pol polyprotein ; ligands: AAU ; X-RAY DIFFRACTION 1.90Å

e1f7aA1[A:1-99] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

POL POLYPROTEIN ; ligands: ACT ; X-RAY DIFFRACTION 2.0Å

e1zlfA1[A:1-99] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

PROTEASE RETROPEPSIN ; ligands: 0ZR ; X-RAY DIFFRACTION 2.30Å

e1ebwB1[B:101-199] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

HIV-1 PROTEASE ; ligands: BEI ; X-RAY DIFFRACTION 1.81Å

e1odwA1[A:1-99] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed,

HIV-1 PROTEASE ; ligands: 0E8 ; X-RAY DIFFRACTION 2.1Å

e1k6pA1[A:1-99] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

POL polyprotein ; ligands: ACT,XN3 ; X-RAY DIFFRACTION 2.200Å

e1ivqB1[B:1-99] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed,

HIV-2 PROTEASE ; ligands: 0PX ; X-RAY DIFFRACTION

e8hvpA1[A:1-99] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

HIV-1 PROTEASE ; X-RAY DIFFRACTION

e1hvcA1[A:1B-99A] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

HIV-1 PROTEASE ; ligands: A79 ; X-RAY DIFFRACTION 1.8Å

e3fivB1[B:6-116] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

FELINE IMMUNODEFICIENCY VIRUS PROTEASE ; ligands: SO4 ; X-RAY DIFFRACTION 1.85Å

e1b11A1[A:4-116] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

PROTEIN (FELINE IMMUNODEFICIENCY VIRUS PROTEASE) ; ligands: 3TL,SO4 ; X-RAY DIFFRACTION 1.9Å

e2fivB1[B:4-116] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

FELINE IMMUNODEFICIENCY VIRUS PROTEASE ; ligands: SO4 ; X-RAY DIFFRACTION 1.90Å

e2fivA1[A:4-116] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

FELINE IMMUNODEFICIENCY VIRUS PROTEASE ; ligands: SO4 ; X-RAY DIFFRACTION 1.90Å

e3fivA1[A:6-116] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

FELINE IMMUNODEFICIENCY VIRUS PROTEASE ; ligands: SO4 ; X-RAY DIFFRACTION 1.85Å

e5fivA1[A:5-116] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

RETROPEPSIN ; ligands: 3TL ; X-RAY DIFFRACTION 1.9Å

e6fivA1[A:5-116] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

RETROPEPSIN ; ligands: 3TL,SO4 ; X-RAY DIFFRACTION 1.9Å

e1fivA1[A:4-116] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

FIV PROTEASE ; X-RAY DIFFRACTION

e2rspB1[B:1-124] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

RSV PROTEASE ; X-RAY DIFFRACTION

e1baiA1[A:1-124] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

PROTEASE ; ligands: 0Q4 ; X-RAY DIFFRACTION 2.4Å

e1baiB1[B:1-124] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

PROTEASE ; ligands: 0Q4 ; X-RAY DIFFRACTION 2.4Å

e1mvpA1[A:1-124] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

MYELOBLASTOSIS ASSOCIATED VIRAL PROTEASE ; X-RAY DIFFRACTION

e1mvpB1[B:1-124] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

MYELOBLASTOSIS ASSOCIATED VIRAL PROTEASE ; X-RAY DIFFRACTION

e1fmbA1[A:1-104] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed,

EIAV PROTEASE ; ligands: HYB ; X-RAY DIFFRACTION 1.80Å

e3nr6A1[A:1-124] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Protease p14 ; ligands: K,PO4 ; X-RAY DIFFRACTION 1.97Å

e3gguA1[A:1-99] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Protease ; ligands: 017 ; X-RAY DIFFRACTION 1.8Å

e3oq7A1[A:1-99] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

HIV-1 PROTEASE ; X-RAY DIFFRACTION 1.71Å

e3ixoA1[A:1-99] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

HIV-1 PROTEASE ; X-RAY DIFFRACTION 1.7Å

e3lzsA1[A:1-99] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

HIV-1 protease ; ligands: 017,ACT ; X-RAY DIFFRACTION 1.950Å

e3mwsA1[A:1-99] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

HIV-1 Protease ; ligands: 017,CL ; X-RAY DIFFRACTION 1.09Å

e3ndtA1[A:1-100] Image Pymol Jmol Links: PDB, SCOP, CATHDOI

PROTEASE ; ligands: CL,DMS,ROC ; X-RAY DIFFRACTION 1.72Å

e3fsmA1[A:1-203] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

COVALENT DIMER [L-Ala51, D-Ala51'] HIV-1 PROTEASE ; ligands: 2NC ; X-RAY DIFFRACTION 1.600Å

e3linA1[A:1-116] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Protease ; ligands: E13 ; X-RAY DIFFRACTION 1.96Å

e4dqbA1[A:1-99] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Aspartyl protease ; ligands: 017,EDO ; X-RAY DIFFRACTION 1.500Å

e3tkgA1[A:-4-99] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Protease ; ligands: CL,GOL,ROC ; X-RAY DIFFRACTION 1.36Å

e3u7sA1[A:1-99] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Pol polyprotein ; ligands: 017,BME ; X-RAY DIFFRACTION 2.05Å

e3ucbA1[A:1-99] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

PROTEASE ; ligands: 017 ; X-RAY DIFFRACTION 1.38Å

e3ttpA1[A:1-99] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

HIV-1 protease ; ligands: 017,CL ; X-RAY DIFFRACTION 2.2Å

e4fe6A1[A:1-99] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

HIV protease ; ligands: 0TQ ; X-RAY DIFFRACTION 2.000Å

e3t11A1[A:1-99] Image Pymol Jmol Links: PDB, SCOP, CATH

HIV-1 Protease ; ligands: 3T1,BME,CL ; X-RAY DIFFRACTION 2.22Å

e3s45A1[A:1-99] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

PROTEASE ; ligands: 478,CL,IMD,NA,ZN ; X-RAY DIFFRACTION 1.51Å

e4a6bA1[A:1-99] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

POL PROTEIN ; ligands: QG8 ; X-RAY DIFFRACTION 1.80Å

e4a4qA1[A:1-99] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

PROTEASE ; ligands: UX9 ; X-RAY DIFFRACTION 1.80Å

e3t3cA1[A:1-99] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

HIV-1 protease ; ligands: 017,BME,SO4 ; X-RAY DIFFRACTION 2.1Å

e3r0wA1[A:1-99] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

MULTIDRUG-RESISTANT CLINICAL ISOLATE 769 HIV-1 PROTEASE ; ligands: RSY ; X-RAY DIFFRACTION 1.7Å

e4faeA1[A:1-99] Image Pymol Jmol Links: PDB, SCOP, CATH

HIV-1 PROTEASE ; X-RAY DIFFRACTION 2.3Å

e3qbfA1[A:1-99] Image Pymol Jmol Links: PDB, SCOP, CATH

PROTEASE ; ligands: CL,GOL,JHG ; X-RAY DIFFRACTION 1.45Å

e3qihA1[A:1-99] Image Pymol Jmol Links: PDB, SCOP, CATH

PROTEASE ; ligands: CL,FG7,NI7 ; X-RAY DIFFRACTION 1.39Å

e3qn8A1[A:1-99] Image Pymol Jmol Links: PDB, SCOP, CATH

PROTEASE ; ligands: CL,NI7 ; X-RAY DIFFRACTION 1.38Å

e3qp0A1[A:1-99] Image Pymol Jmol Links: PDB, SCOP, CATH

PROTEASE ; ligands: CL,NI8 ; X-RAY DIFFRACTION 1.45Å

e3sa3A1[A:1-99] Image Pymol Jmol Links: PDB, SCOP, CATH

Protease ; ligands: 23X,ACT,PO4 ; X-RAY DIFFRACTION 1.65Å

e4djoA1[A:1-99] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Pol polyprotein ; ligands: ACT,GOL,MK5 ; X-RAY DIFFRACTION 1.780Å

e3s85A1[A:1-99] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Protease/reverse transcriptase ; ligands: LK0 ; X-RAY DIFFRACTION 2.8Å

e4e43A1[A:1-99] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Protease ; ligands: ACT,DMS,GOL ; X-RAY DIFFRACTION 1.540Å

e3u71A1[A:1-99] Image Pymol Jmol Links: PDB, SCOP, CATH

HIV-1 PROTEASE ; X-RAY DIFFRACTION 2.72Å

e3s43A1[A:1-99] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

PROTEASE ; ligands: 478,GOL,IOD ; X-RAY DIFFRACTION 1.26Å

e3tofA1[A:1-99] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Gag-Pol polyprotein ; ligands: 076,ACT,DMS ; X-RAY DIFFRACTION 1.45Å

e4fl8A1[A:1-99] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

HIV-1 PROTEASE ; ligands: CL,GOL ; X-RAY DIFFRACTION 1.2Å

Previous Next

e2fmbA1[A:1-104] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed,

EQUINE INFECTIOUS ANEMIA VIRUS PROTEASE ; ligands: LP1 ; X-RAY DIFFRACTION 1.8Å

e4fivA1[A:4-116] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed,

FELINE IMMUNODEFICIENCY VIRUS PROTEASE ; ligands: LP1 ; X-RAY DIFFRACTION 1.8Å

e1nsoA1[A:1-107] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Protease 13 kDa ; SOLUTION NMR

e2rspA1[A:1-124] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

RSV PROTEASE ; X-RAY DIFFRACTION

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.

T: double psi

152436, 2-crossover-3, 5-crossover-6

T: AbrB

122'1'344'3', 2-crossover-3, 2'-crossover-3'

T: Bacterial fluorinating enzyme-C

1265437, 2-crossover-3, 6-crossover-7

T: FMN-binding split barrel

123654, 3-crossover-4

T: Surface presentation of antigens (SPOA)

123654, 3-crossover-4, swapping

T: Alanine racemase-C

125436, 2-crossover-3, 5-crossover-6

T: Aminomethyltransferase beta-barrel domain

143256, 1-crossover-2, 4-crossover-5

T: PUA domain

12543, 2-crossover-3

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