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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

X: HIT-like
H: HIT-related
T: HIT-related
F: HIT

PF01230 CL0265

Representatives:

e1kpfA1[A:16-126] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

PROTEIN KINASE C INTERACTING PROTEIN ; ligands: AMP ; X-RAY DIFFRACTION 1.4Å

e2oikA1[A:6-144] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH

Histidine triad (HIT) protein ; ligands: CL,GOL,ZN ; X-RAY DIFFRACTION 1.650Å

e1fitA1[A:2-106,A:127-147] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

FRAGILE HISTIDINE PROTEIN ; ligands: FRU,SO4 ; X-RAY DIFFRACTION 1.85Å

e5wa9B1[B:15-126] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Histidine triad nucleotide-binding protein 1 ; ligands: 9ZD,CL ; X-RAY DIFFRACTION 1.150Å

e1emsB1[B:298-440] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

NIT-FRAGILE HISTIDINE TRIAD FUSION PROTEIN ; X-RAY DIFFRACTION 2.8Å

e1emsA1[A:298-440] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

NIT-FRAGILE HISTIDINE TRIAD FUSION PROTEIN ; ligands: NA ; X-RAY DIFFRACTION 2.8Å

e3ksvA1[A:1-141] Image Pymol Jmol Links: PDB, SCOP, CATH

Uncharacterized protein ; ligands: ZN ; X-RAY DIFFRACTION 1.900Å

e3anoA2[A:55-195] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

AP-4-A phosphorylase ; ligands: PG4,PO4 ; X-RAY DIFFRACTION 1.894Å

e3anoB1[B:24-198] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

AP-4-A phosphorylase ; ligands: PG4,PO4 ; X-RAY DIFFRACTION 1.894Å

e3wo5A1[A:55-195] Image Pymol Jmol Links: PDB, SCOP, CATH

AP-4-A phosphorylase ; ligands: PG4,PO4 ; X-RAY DIFFRACTION 2.79Å

e3wo5B1[B:24-198] Image Pymol Jmol Links: PDB, SCOP, CATH

AP-4-A phosphorylase ; ligands: GOL,PG4,PO4 ; X-RAY DIFFRACTION 2.79Å

e6g9zA1[A:6-126] Image Pymol Jmol Links: PDB, SCOP, CATH

Histidine triad nucleotide-binding protein 1 ; ligands: LMR ; X-RAY DIFFRACTION 1.43Å

e6g9zB1[B:9-126] Image Pymol Jmol Links: PDB, SCOP, CATH

Histidine triad nucleotide-binding protein 1 ; ligands: LMR ; X-RAY DIFFRACTION 1.43Å

e5waaA1[A:11-126] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Histidine triad nucleotide-binding protein 1 ; X-RAY DIFFRACTION 1.100Å

e5waaB1[B:15-126] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Histidine triad nucleotide-binding protein 1 ; ligands: CL ; X-RAY DIFFRACTION 1.100Å

e6iq1A1[A:6-148] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Adenosine 5'-monophosphoramidase ; ligands: ZN ; X-RAY DIFFRACTION 2.485Å

e6iq1B1[B:4-148] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Adenosine 5'-monophosphoramidase ; ligands: ZN ; X-RAY DIFFRACTION 2.485Å

e6iq1C1[C:6-149] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Adenosine 5'-monophosphoramidase ; ligands: ZN ; X-RAY DIFFRACTION 2.485Å

e6iq1D1[D:5-148] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Adenosine 5'-monophosphoramidase ; ligands: ZN ; X-RAY DIFFRACTION 2.485Å

e6af2D1[D:1-16,D:42-176] Image Pymol Jmol Links: PDB, SCOP, CATH

HIT domain-containing protein ; ligands: 1PE,SPM ; X-RAY DIFFRACTION 3.00Å

e6af2A1[A:1-15,A:42-176] Image Pymol Jmol Links: PDB, SCOP, CATH

HIT domain-containing protein ; ligands: 1PE,PEG,SPM ; X-RAY DIFFRACTION 3.00Å

e6af2B1[B:36-176] Image Pymol Jmol Links: PDB, SCOP, CATH

HIT domain-containing protein ; ligands: PEG,SPM ; X-RAY DIFFRACTION 3.00Å

e6af2C1[C:36-176] Image Pymol Jmol Links: PDB, SCOP, CATH

HIT domain-containing protein ; X-RAY DIFFRACTION 3.00Å

e6j5sB1[B:11-126] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Histidine triad nucleotide-binding protein 1 ; ligands: AP5,ESA ; X-RAY DIFFRACTION 1.02Å

e6n3vA1[A:12-126] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Histidine triad nucleotide-binding protein 1 ; ligands: KB7 ; X-RAY DIFFRACTION 1.450Å

e6n3wA1[A:12-126] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Histidine triad nucleotide-binding protein 1 ; ligands: KBJ ; X-RAY DIFFRACTION 1.750Å

e6n3xA1[A:12-126] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Histidine triad nucleotide-binding protein 1 ; ligands: EDO,KBD ; X-RAY DIFFRACTION 1.100Å

e6n3yA1[A:12-126] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Histidine triad nucleotide-binding protein 1 ; ligands: HHJ ; X-RAY DIFFRACTION 1.578Å

e6n3vB1[B:15-126] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Histidine triad nucleotide-binding protein 1 ; ligands: CL,KB7 ; X-RAY DIFFRACTION 1.450Å

e6n3wB1[B:15-126] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Histidine triad nucleotide-binding protein 1 ; ligands: KBJ ; X-RAY DIFFRACTION 1.750Å

e6n3xB1[B:15-126] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Histidine triad nucleotide-binding protein 1 ; ligands: CL,KBD ; X-RAY DIFFRACTION 1.100Å

e6n3yB1[B:17-126] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Histidine triad nucleotide-binding protein 1 ; ligands: CL,HHJ ; X-RAY DIFFRACTION 1.578Å

e6j5sA1[A:14-126] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Histidine triad nucleotide-binding protein 1 ; X-RAY DIFFRACTION 1.02Å

e6j5zB1[B:15-126] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Histidine triad nucleotide-binding protein 1 ; X-RAY DIFFRACTION 1.30Å

e6j5zC1[C:15-126] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Histidine triad nucleotide-binding protein 1 ; X-RAY DIFFRACTION 1.30Å

e6j64A1[A:14-126] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Histidine triad nucleotide-binding protein 1 ; X-RAY DIFFRACTION 0.95Å

e6j65A1[A:16-126] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Histidine triad nucleotide-binding protein 1 ; X-RAY DIFFRACTION 1.420Å

e6j65D1[D:16-126] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Histidine triad nucleotide-binding protein 1 ; X-RAY DIFFRACTION 1.420Å

e6j5zA1[A:12-126] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Histidine triad nucleotide-binding protein 1 ; ligands: ADN,ESA ; X-RAY DIFFRACTION 1.30Å

e6j5zD1[D:12-126] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Histidine triad nucleotide-binding protein 1 ; ligands: ADN ; X-RAY DIFFRACTION 1.30Å

e6j64B1[B:12-126] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Histidine triad nucleotide-binding protein 1 ; ligands: B4P,TAU ; X-RAY DIFFRACTION 0.95Å

e6j65B1[B:12-126] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Histidine triad nucleotide-binding protein 1 ; ligands: B4P,EPE ; X-RAY DIFFRACTION 1.420Å

e6j65E1[E:12-126] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Histidine triad nucleotide-binding protein 1 ; ligands: B4P,EPE ; X-RAY DIFFRACTION 1.420Å

e6j53B1[B:12-126] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Histidine triad nucleotide-binding protein 1 ; ligands: AMP ; X-RAY DIFFRACTION 1.52Å

e6j58B1[B:12-126] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Histidine triad nucleotide-binding protein 1 ; ligands: AMP ; X-RAY DIFFRACTION 1.52Å

e6j53A1[A:14-126] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Histidine triad nucleotide-binding protein 1 ; X-RAY DIFFRACTION 1.52Å

e6j58A1[A:13-126] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Histidine triad nucleotide-binding protein 1 ; X-RAY DIFFRACTION 1.52Å

e6ypxAAA1[AAA:51-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Histidine triad nucleotide-binding protein 2, mitochondrial ; ligands: CAC,GOL ; X-RAY DIFFRACTION 2.11Å

e6yqmAAA1[AAA:10-126] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Histidine triad nucleotide-binding protein 1 ; ligands: DGP ; X-RAY DIFFRACTION 1.02Å

e6yi0AAA1[AAA:52-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Histidine triad nucleotide-binding protein 2, mitochondrial ; X-RAY DIFFRACTION 1.65Å

e6yi0BBB1[BBB:62-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Histidine triad nucleotide-binding protein 2, mitochondrial ; ligands: NA ; X-RAY DIFFRACTION 1.65Å

e6yi0DDD1[DDD:67-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Histidine triad nucleotide-binding protein 2, mitochondrial ; X-RAY DIFFRACTION 1.65Å

e6yi0CCC1[CCC:52-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Histidine triad nucleotide-binding protein 2, mitochondrial ; X-RAY DIFFRACTION 1.65Å

e6yprAAA1[AAA:68-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Histidine triad nucleotide-binding protein 2, mitochondrial ; ligands: GOL ; X-RAY DIFFRACTION 1.26Å

e6ypxBBB1[BBB:51-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Histidine triad nucleotide-binding protein 2, mitochondrial ; ligands: GOL,NA ; X-RAY DIFFRACTION 2.11Å

e6ypxCCC1[CCC:51-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Histidine triad nucleotide-binding protein 2, mitochondrial ; ligands: GOL,NA ; X-RAY DIFFRACTION 2.11Å

e6ypxDDD1[DDD:51-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Histidine triad nucleotide-binding protein 2, mitochondrial ; ligands: CAC,GOL,NA ; X-RAY DIFFRACTION 2.11Å

e6yqdAAA1[AAA:61-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Histidine triad nucleotide-binding protein 2, mitochondrial ; ligands: K ; X-RAY DIFFRACTION 1.407Å

e6yqdBBB1[BBB:52-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Histidine triad nucleotide-binding protein 2, mitochondrial ; X-RAY DIFFRACTION 1.407Å

e6yqmBBB1[BBB:15-126] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Histidine triad nucleotide-binding protein 1 ; ligands: PEG ; X-RAY DIFFRACTION 1.02Å

e6yvpAAA1[AAA:52-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Histidine triad nucleotide-binding protein 2, mitochondrial ; ligands: DGP ; X-RAY DIFFRACTION 2.77Å

e6yvpBBB1[BBB:52-163] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Histidine triad nucleotide-binding protein 2, mitochondrial ; ligands: DGP ; X-RAY DIFFRACTION 2.77Å

e7mqwA1[A:3-139] Image Pymol Jmol Links: PDB, SCOP, CATH

HIT family protein ; ligands: SO4 ; X-RAY DIFFRACTION 1.55Å

e7mqwB1[B:3-139] Image Pymol Jmol Links: PDB, SCOP, CATH

HIT family protein ; ligands: SO4 ; X-RAY DIFFRACTION 1.55Å

e7p8pA1[A:2-107,A:128-148] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Bis(5'-adenosyl)-triphosphatase ; ligands: 6BI,NA ; X-RAY DIFFRACTION 2.336Å

e7p8pC1[C:2-107,C:128-147] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Bis(5'-adenosyl)-triphosphatase ; ligands: 6BI,TRS ; X-RAY DIFFRACTION 2.336Å

e7p8pB1[B:2-148] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Bis(5'-adenosyl)-triphosphatase ; ligands: 6BI,NA,TRS ; X-RAY DIFFRACTION 2.336Å

e7p8pD1[D:2-147] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Bis(5'-adenosyl)-triphosphatase ; ligands: 6BI ; X-RAY DIFFRACTION 2.336Å

e8paiA1[A:11-126] Image Pymol Jmol Links: PDB, SCOP, CATH

; ligands: XKO ; X-RAY DIFFRACTION 1.80Å

e3i24A1[A:2-144] Image Pymol Jmol Links: PDB, SCOP, CATH

HIT family hydrolase ; ligands: NA ; X-RAY DIFFRACTION 1.5Å

e3i24B1[B:3-141] Image Pymol Jmol Links: PDB, SCOP, CATH

HIT family hydrolase ; ligands: NA ; X-RAY DIFFRACTION 1.5Å

e3oheA1[A:0-136] Image Pymol Jmol Links: PDB, SCOP, CATH

Histidine triad (HIT) protein ; ligands: CA,GOL ; X-RAY DIFFRACTION 1.20Å

e3oheB1[B:0-136] Image Pymol Jmol Links: PDB, SCOP, CATH

Histidine triad (HIT) protein ; ligands: CA,GOL ; X-RAY DIFFRACTION 1.20Å

Previous

e1y23A1[A:5-143] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH

Histidine triad protein ; ligands: ZN ; X-RAY DIFFRACTION 2.30Å

e4q61B1[B:1-102] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH Obsolete PDB

; ligands: AMP

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