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3RDU

Crystal structure of R7-2 streptavidin complexed with PEG

Functional Information from GO Data
ChainGOidnamespacecontents
A0009374molecular_functionbiotin binding
Functional Information from PDB Data
site_idAC1
Number of Residues8
DetailsBINDING SITE FOR RESIDUE GOL A 500
ChainResidue
AGLN24
AALA119
ATRP120
AGLY126
AHIS127
AHOH192
AHOH238
AHOH255

site_idAC2
Number of Residues11
DetailsBINDING SITE FOR RESIDUE GOL A 501
ChainResidue
AGLY94
AGLN95
AASN105
ATHR106
AGLN107
ATHR111
AALA119
ASER122
ATHR123
AHOH246
ASER93

site_idAC3
Number of Residues8
DetailsBINDING SITE FOR RESIDUE GOL A 503
ChainResidue
AGLY52
ASER53
AASP67
AASN81
AASN82
ATYR83
AHOH226
AHOH229

site_idAC4
Number of Residues10
DetailsBINDING SITE FOR RESIDUE 1PE A 700
ChainResidue
AASN23
ALEU25
AASN49
ATRP79
ASER88
ASER90
ATRP120
AASP128
AHOH171
AHOH247

Functional Information from PROSITE/UniProt
site_idPS00577
Number of Residues15
DetailsAVIDIN_1 Avidin-like domain signature. NawKStlVGhDtFTK
ChainResidueDetails
AASN118-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 Residues2
DetailsMotif: {"description":"Cell attachment site; atypical"}
ChainResidueDetails

site_idSWS_FT_FI3
Number of Residues5
DetailsBinding site: {}
ChainResidueDetails

244693

PDB entries from 2025-11-12

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