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3Q5G

Sulphur SAD structure solution of proteinase K grown in SO4 solution

Functional Information from GO Data
ChainGOidnamespacecontents
A0004252molecular_functionserine-type endopeptidase activity
A0006508biological_processproteolysis
A0008236molecular_functionserine-type peptidase activity
Functional Information from PDB Data
site_idAC1
Number of Residues6
DetailsBINDING SITE FOR RESIDUE SO4 A 280
ChainResidue
APRO7
ATRP8
AARG185
AHOH439
AHOH571
AHOH603

site_idAC2
Number of Residues7
DetailsBINDING SITE FOR RESIDUE CA A 281
ChainResidue
AHOH294
AHOH451
AHOH465
AHOH541
APRO175
AVAL177
AASP200

site_idAC3
Number of Residues10
DetailsBINDING SITE FOR RESIDUE GOL A 282
ChainResidue
AARG188
AARG189
ALYS242
ATHR243
ASER247
ATYR251
AASN263
AHOH286
AHOH450
AHOH455

Functional Information from PROSITE/UniProt
site_idPS00136
Number of Residues12
DetailsSUBTILASE_ASP Serine proteases, subtilase family, aspartic acid active site. VYVIDTGIeasH
ChainResidueDetails
AVAL35-HIS46

site_idPS00137
Number of Residues11
DetailsSUBTILASE_HIS Serine proteases, subtilase family, histidine active site. HGThCAGtVGS
ChainResidueDetails
AHIS69-SER79

site_idPS00138
Number of Residues11
DetailsSUBTILASE_SER Serine proteases, subtilase family, serine active site. GTSmAtPhVAG
ChainResidueDetails
AGLY222-GLY232

Functional Information from SwissProt/UniProt
site_idSWS_FT_FI1
Number of Residues3
DetailsACT_SITE: Charge relay system => ECO:0000255|PROSITE-ProRule:PRU01240
ChainResidueDetails
AASP39
AHIS69
ASER224

site_idSWS_FT_FI2
Number of Residues5
DetailsBINDING:
ChainResidueDetails
ATHR16
APRO175
AVAL177
AASP200
AASP260

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PDB entries from 2025-06-11

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