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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

X: IL8-related
H: IL8-related
T: IL8
F: IL8

PF00048 CL0730

Representatives:

e1b3aA1[A:2-68] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

PROTEIN (RANTES) ; ligands: AOP,SO4 ; X-RAY DIFFRACTION 1.6Å

e1m8aA1[A:5-65] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

SMALL INDUCIBLE CYTOKINE A20 ; ligands: IPA ; X-RAY DIFFRACTION 1.7Å

e2fhtA1[A:4-71] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Viral macrophage inflammatory protein-II ; X-RAY DIFFRACTION 1.70Å

e1nr4A1[A:2-68] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Thymus and activation-regulated chemokine ; ligands: SO4 ; X-RAY DIFFRACTION 1.72Å

e1tvxA1[A:23-86] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

NEUTROPHIL ACTIVATING PEPTIDE 2 VARIANT ; X-RAY DIFFRACTION 1.75Å

e1dokA1[A:0-71] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

MONOCYTE CHEMOATTRACTANT PROTEIN 1 ; ligands: SO4 ; X-RAY DIFFRACTION 1.85Å

e1o7zA1[A:9-69] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

SMALL INDUCIBLE CYTOKINE B10 ; X-RAY DIFFRACTION 1.92Å

e2j7zA1[A:1-67] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

STROMAL CELL-DERIVED FACTOR 1 ALPHA ; X-RAY DIFFRACTION 1.95Å

e1f2lA1[A:5-68] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

FRACTALKINE ; X-RAY DIFFRACTION 2.0Å

e1eigA1[A:1-73] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

EOTAXIN-2 ; SOLUTION NMR

e1el0A1[A:1-74] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

I-309 ; SOLUTION NMR

e1humA1[A:2-69] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed,

HUMAN MACROPHAGE INFLAMMATORY PROTEIN 1 BETA ; SOLUTION NMR

e1je4A1[A:2-69] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

macrophage inflammatory protein 1-beta ; SOLUTION NMR

e1hunA1[A:2-69] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed,

HUMAN MACROPHAGE INFLAMMATORY PROTEIN 1 BETA ; SOLUTION NMR

e1humB1[B:2-69] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed,

HUMAN MACROPHAGE INFLAMMATORY PROTEIN 1 BETA ; SOLUTION NMR

e1hunB1[B:2-69] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed,

HUMAN MACROPHAGE INFLAMMATORY PROTEIN 1 BETA ; SOLUTION NMR

e2x6lA1[A:4-69] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

C-C MOTIF CHEMOKINE 4 ; X-RAY DIFFRACTION 2.6Å

e3tn2A1[A:1-68] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

C-C motif chemokine 4 ; ligands: ZN ; X-RAY DIFFRACTION 1.6Å

e2ffkB1[B:1-69] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Small inducible cytokine A4 ; SOLUTION NMR

e2q8tA1[A:10-71] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

CCL14 ; X-RAY DIFFRACTION 2.230Å

e2ra4A1[A:3-67] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

SMALL-INDUCIBLE CYTOKINE A13 ; ligands: SO4 ; X-RAY DIFFRACTION 1.7Å

e2finB1[B:1-69] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Small inducible cytokine A4 ; SOLUTION NMR

e2q8rE1[E:1-66] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

CCL14 ; X-RAY DIFFRACTION 1.820Å

e2q8rF1[F:1-63] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

CCL14 ; X-RAY DIFFRACTION 1.820Å

e2q8rG1[G:1-63] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

CCL14 ; X-RAY DIFFRACTION 1.820Å

e2q8rH1[H:1-63] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

CCL14 ; X-RAY DIFFRACTION 1.820Å

e2q8tB1[B:10-74] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

CCL14 ; X-RAY DIFFRACTION 2.230Å

e2q8tC1[C:10-74] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

CCL14 ; X-RAY DIFFRACTION 2.230Å

e2q8tD1[D:10-73] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

CCL14 ; X-RAY DIFFRACTION 2.230Å

e2ra4B1[B:3-67] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

SMALL-INDUCIBLE CYTOKINE A13 ; ligands: SO4,TFA ; X-RAY DIFFRACTION 1.7Å

e3fpuB1[B:2-67] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

C-C motif chemokine 3 ; X-RAY DIFFRACTION 1.76Å

e2x6gK1[K:6-66] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

C-C MOTIF CHEMOKINE 3 ; X-RAY DIFFRACTION 2.15Å

e2x6lB1[B:5-69] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

C-C MOTIF CHEMOKINE 4 ; ligands: GOL ; X-RAY DIFFRACTION 2.6Å

e2x6lC1[C:4-69] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

C-C MOTIF CHEMOKINE 4 ; ligands: GOL ; X-RAY DIFFRACTION 2.6Å

e2x6lD1[D:5-69] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

C-C MOTIF CHEMOKINE 4 ; ligands: GOL ; X-RAY DIFFRACTION 2.6Å

e2x6lE1[E:4-69] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

C-C MOTIF CHEMOKINE 4 ; X-RAY DIFFRACTION 2.6Å

e4oijA1[A:4-74] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

C-C MOTIF CHEMOKINE 1 ; ligands: SO4 ; X-RAY DIFFRACTION 2.0Å

e4oijB1[B:4-74] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

C-C MOTIF CHEMOKINE 1 ; ligands: SO4 ; X-RAY DIFFRACTION 2.0Å

e4oikA1[A:1-73] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

C-C MOTIF CHEMOKINE 1 ; ligands: NAG,SO4 ; X-RAY DIFFRACTION 2.1Å

e4oikB1[B:1-73] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

C-C MOTIF CHEMOKINE 1 ; ligands: CIT,NAG,SO4 ; X-RAY DIFFRACTION 2.1Å

e4mheA1[A:1-69] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

C-C motif chemokine 18 ; ligands: ACT ; X-RAY DIFFRACTION 2.1Å

e4mheB1[B:1-69] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

C-C motif chemokine 18 ; ligands: ACT ; X-RAY DIFFRACTION 2.1Å

e4mheC1[C:8-68] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

C-C motif chemokine 18 ; X-RAY DIFFRACTION 2.1Å

e4mheD1[D:9-68] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

C-C motif chemokine 18 ; X-RAY DIFFRACTION 2.1Å

e4zkbB1[B:8-64] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

C-C motif chemokine 3 ; X-RAY DIFFRACTION 2.90Å

e4zltF1[F:7-68] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

C-C motif chemokine 3 ; X-RAY DIFFRACTION 2.761Å

e4zltL1[L:7-68] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

C-C motif chemokine 3 ; X-RAY DIFFRACTION 2.761Å

e2jp1A1[A:1-60] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Lymphotactin ; SOLUTION NMR

e2jp1B1[B:1-60] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Lymphotactin ; SOLUTION NMR

e1g2tA1[A:1-71] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

EOTAXIN-3 ; SOLUTION NMR

e1j8iA1[A:1-69] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Lymphotactin ; SOLUTION NMR

e1rjtA1[A:1-73] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Small inducible cytokine B11 ; SOLUTION NMR

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