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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

X: Cas8-like
H: Cascade subunit CasA/Cse1/Cas8
T: Cascade subunit CasA/Cse1/Cas8
F: CRISPR_Cse1

PF09481

Representatives:

e4an8A1[A:4-496] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

CSE1 ; ligands: ACT ; X-RAY DIFFRACTION 2.3Å

e4h3tA1[A:2-531] Image Pymol Jmol Links: PDB, SCOP, CATH

CRISPR-ASSOCIATED PROTEIN, CSE1 FAMILY ; ligands: GOL ; X-RAY DIFFRACTION 2.03Å

e4an8B1[B:5-400,B:424-493] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

CSE1 ; ligands: ACT ; X-RAY DIFFRACTION 2.3Å

e4ej3A1[A:5-497] Image Pymol Jmol Links: PDB, SCOP, CATH

CRISPR associated protein ; X-RAY DIFFRACTION 2.50Å

e4ej3B1[B:5-497] Image Pymol Jmol Links: PDB, SCOP, CATH

CRISPR associated protein ; X-RAY DIFFRACTION 2.50Å

e1vy8U1[U:3-496] Image Pymol Jmol Links: PDB, SCOP, CATH Obsolete PDB

; ligands: ZN

e4tvxU1[U:3-496] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

CRISPR system Cascade subunit CasA ; ligands: ZN ; X-RAY DIFFRACTION 3.24Å

e4tvxI1[I:3-496] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

CRISPR system Cascade subunit CasA ; ligands: ZN ; X-RAY DIFFRACTION 3.24Å

e1vy9I1[I:3-496] Image Pymol Jmol Links: PDB, SCOP, CATH Obsolete PDB

; ligands: ZN

e4u7uA1[A:1-495] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

CRISPR system Cascade subunit CasA ; X-RAY DIFFRACTION 3.000Å

e4u7uM1[M:1-495] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

CRISPR system Cascade subunit CasA ; X-RAY DIFFRACTION 3.000Å

e4qyzA1[A:1-495] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

CRISPR system Cascade subunit CasA ; ligands: ZN ; X-RAY DIFFRACTION 3.03Å

e4f3eA2[A:5-496] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

CASA ; X-RAY DIFFRACTION 2.4Å

e4f3eB2[B:5-496] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

CASA ; X-RAY DIFFRACTION 2.4Å

e3wvoA1[A:1-547] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

CRISPR-associated protein, Cse1 family ; X-RAY DIFFRACTION 3.3Å

e3wvoB1[B:1-546] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

CRISPR-associated protein, Cse1 family ; X-RAY DIFFRACTION 3.3Å

e3wvoC1[C:1-546] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

CRISPR-associated protein, Cse1 family ; X-RAY DIFFRACTION 3.3Å

e5cd4I1[I:1-495] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

CRISPR system Cascade subunit CasA ; ligands: ZN ; X-RAY DIFFRACTION 3.2Å

e5cd4U1[U:1-496] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

CRISPR system Cascade subunit CasA ; ligands: ZN ; X-RAY DIFFRACTION 3.2Å

e5h9eA1[A:2-495] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

CRISPR system Cascade subunit CasA ; ligands: ZN ; X-RAY DIFFRACTION 3.200Å

e5h9fA1[A:2-495] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

CRISPR system Cascade subunit CasA ; ligands: ZN ; X-RAY DIFFRACTION 2.450Å

e5u0aC1[C:17-538] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

CRISPR-associated protein, Cse1 family ; ELECTRON MICROSCOPY

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