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2IZF

STREPTAVIDIN-BIOTIN PH 4.0 I222 COMPLEX

Functional Information from GO Data
ChainGOidnamespacecontents
B0009374molecular_functionbiotin binding
D0009374molecular_functionbiotin binding
Functional Information from PDB Data
site_idAC1
Number of Residues5
DetailsBINDING SITE FOR RESIDUE SO4 D 300
ChainResidue
BTRP120
BLYS121
DVAL47
DGLY48
DARG84

site_idAC2
Number of Residues15
DetailsBINDING SITE FOR RESIDUE BTN B 300
ChainResidue
BSER45
BVAL47
BGLY48
BASN49
BTRP79
BSER88
BTHR90
BTRP108
BASP128
BHOH1470
DHOH1617
BASN23
BLEU25
BSER27
BTYR43

site_idAC3
Number of Residues15
DetailsBINDING SITE FOR RESIDUE BTN D 301
ChainResidue
DASN23
DLEU25
DSER27
DTYR43
DSER45
DVAL47
DGLY48
DASN49
DTRP79
DALA86
DSER88
DTHR90
DTRP108
DASP128
DHOH1519

Functional Information from PROSITE/UniProt
site_idPS00577
Number of Residues15
DetailsAVIDIN_1 Avidin-like domain signature. NawKStlVGhDtFTK
ChainResidueDetails
BASN118-LYS132

Functional Information from SwissProt/UniProt
site_idSWS_FT_FI1
Number of Residues122
DetailsDomain: {"description":"Avidin-like","evidences":[{"source":"PROSITE-ProRule","id":"PRU00656","evidenceCode":"ECO:0000255"}]}
ChainResidueDetails

site_idSWS_FT_FI2
Number of Residues4
DetailsMotif: {"description":"Cell attachment site; atypical"}
ChainResidueDetails

site_idSWS_FT_FI3
Number of Residues10
DetailsBinding site: {}
ChainResidueDetails

243531

PDB entries from 2025-10-22

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