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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

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

X: Rubredoxin-like

binds one zinc with two CxxC motifs on two beta-hairpins

X: RING/U-box-like

binds two zincs. one in the same way as rubredoxin, probably related to rubredoxin. the other in a similar way as glucocorticoid receptor

X: Glucocorticoid receptor-like

binds zinc with one beta-hairpin and one helix, the helix binds DNA

X: Fibronectin type I module-like
H: Fibronectin type I module-like
T: Fibronectin type I module
F: fn1

PF00039 CL0451

Representatives:

e2cg7A1[A:109-151] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

FIBRONECTIN ; X-RAY DIFFRACTION 1.2Å

e1fbrA1[A:48-91] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

FIBRONECTIN ; SOLUTION NMR

e2rkyA1[A:199-241] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Fibronectin ; ligands: SCN ; X-RAY DIFFRACTION 1.8Å

e2rl0A1[A:199-241] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Fibronectin ; X-RAY DIFFRACTION 2.000Å

e2rl0B1[B:199-241] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Fibronectin ; X-RAY DIFFRACTION 2.000Å

e2cg6A1[A:109-151] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

HUMAN FIBRONECTIN ; ligands: SO4 ; X-RAY DIFFRACTION 1.550Å

e2rl0D1[D:199-241] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Fibronectin ; X-RAY DIFFRACTION 2.000Å

e2rkyC1[C:199-241] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Fibronectin ; ligands: SCN ; X-RAY DIFFRACTION 1.8Å

e3calA1[A:109-151] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Fibronectin ; X-RAY DIFFRACTION 1.7Å

e2rkzB1[B:109-151] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Fibronectin ; ligands: SIN ; X-RAY DIFFRACTION 2.000Å

e2rkzA1[A:109-151] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Fibronectin ; ligands: ACE,SIN ; X-RAY DIFFRACTION 2.000Å

e2rkzF1[F:109-151] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Fibronectin ; X-RAY DIFFRACTION 2.000Å

e2ckuA1[A:109-151] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

FIBRONECTIN ; SOLUTION NMR

e2rl0K1[K:199-241] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Fibronectin ; X-RAY DIFFRACTION 2.000Å

e2rkzC1[C:109-151] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Fibronectin ; ligands: SIN ; X-RAY DIFFRACTION 2.000Å

e2rkzD1[D:109-151] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Fibronectin ; X-RAY DIFFRACTION 2.000Å

e2rl0F1[F:199-241] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Fibronectin ; X-RAY DIFFRACTION 2.000Å

e2rkzE1[E:109-150] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Fibronectin ; X-RAY DIFFRACTION 2.000Å

e3calC1[C:109-151] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Fibronectin ; X-RAY DIFFRACTION 1.7Å

e1qgbA2[A:17-60] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

PROTEIN (FIBRONECTIN) ; SOLUTION NMR

e1qo6A2[A:1-41] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

FIBRONECTIN ; SOLUTION NMR

e1e8bA3[A:1-41] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

FIBRONECTIN ; SOLUTION NMR

e3ejhA1[A:559-606] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Fibronectin ; X-RAY DIFFRACTION 2.00Å

e3ejhA2[A:516-558] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Fibronectin ; ligands: NAG ; X-RAY DIFFRACTION 2.00Å

e3zrzA1[A:108-151] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

FIBRONECTIN ; ligands: GOL ; X-RAY DIFFRACTION 1.70Å

e3ejhB1[B:559-602] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Fibronectin ; ligands: GOL ; X-RAY DIFFRACTION 2.00Å

e3ejhB2[B:516-558] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Fibronectin ; ligands: NAG ; X-RAY DIFFRACTION 2.00Å

e3gxeB1[B:559-604] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Fibronectin ; X-RAY DIFFRACTION 2.558Å

e3gxeA1[A:559-602] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Fibronectin ; X-RAY DIFFRACTION 2.558Å

e3gxeB2[B:516-558] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Fibronectin ; ligands: NAG ; X-RAY DIFFRACTION 2.558Å

e3gxeA2[A:516-558] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Fibronectin ; ligands: GOL,NAG ; X-RAY DIFFRACTION 2.558Å

e3mqlA4[A:465-513] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

FIBRONECTIN 1 ; X-RAY DIFFRACTION 3.0Å

e3zrzB1[B:109-151] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

FIBRONECTIN ; ligands: GOL ; X-RAY DIFFRACTION 1.70Å

e2ec3A1[A:1-68] Image Pymol Jmol Links: PDB, SCOP, CATH

Fibronectin ; SOLUTION NMR

e2rl0I4[I:199-240] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Fibronectin ; X-RAY DIFFRACTION 2.000Å

e3m7pA17[A:465-510] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

FN1 PROTEIN ; ligands: ZN ; X-RAY DIFFRACTION 2.5Å

e3m7pA18[A:511-559] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

FN1 PROTEIN ; ligands: NAG,ZN ; X-RAY DIFFRACTION 2.5Å

e3m7pA20[A:560-604] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

FN1 PROTEIN ; ligands: 12P,NAG,ZN ; X-RAY DIFFRACTION 2.5Å

e3m7pA16[A:297-346] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

FN1 PROTEIN ; ligands: ZN ; X-RAY DIFFRACTION 2.5Å

e3mqlA7[A:305-346] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

FIBRONECTIN 1 ; X-RAY DIFFRACTION 3.0Å

e4pz5A1[A:109-151] Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

Fibronectin ; X-RAY DIFFRACTION 1.96Å

e2cg7A2[A:62-108] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

FIBRONECTIN ; X-RAY DIFFRACTION 1.2Å

e1e88A3[A:1-41] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

FIBRONECTIN ; SOLUTION NMR

e1o9aA2[A:17-60] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

FIBRONECTIN ; SOLUTION NMR

e1tpnA1[A:1-50] nonrep Image Pymol Jmol Links: PDB, SCOP, CATH, PubMed, DOI

TISSUE-TYPE PLASMINOGEN ACTIVATOR ; SOLUTION NMR

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.

extended segmentsextended, non-globular segments, frequently bind to other proteins to form complexes