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3SSI

PROTEINASE INHIBITOR SSI (STREPTOMYCES SUBTILISIN, INHIBITOR) FROM STREPTOMYCES ALBOGRISEOLUS

Replaces:  2SSIReplaces:  1SSI
Functional Information from GO Data
ChainGOidnamespacecontents
A0004867molecular_functionserine-type endopeptidase inhibitor activity
A0005576cellular_componentextracellular region
A0010466biological_processnegative regulation of peptidase activity
Functional Information from PDB Data
site_idPCR
Number of Residues9
DetailsTHE PRIMARY CONTACT REGION (PCR) CONSISTS OF P7-P2' RESIDUES WHICH INVOLVE THE SCISSILE BOND (OR THE REACTIVE SITE PEPTIDE BOND) AND MAKE CONTACTS WITH THE TARGET ENZYMES.
ChainResidue
AGLU67
AASP68
AVAL69
AMET70
ACYS71
APRO72
AMET73
AVAL74
ATYR75

site_idSCR
Number of Residues5
DetailsTHE SECONDARY CONTACT REGION (SCR) IS LOCATED CLOSE TO THE PRIMARY CONTACT REGION. THE MAIN ROLE OF THE SCR IS PERHAPS TO STABILIZE THE PRIMARY CONTACT REGION FROM INSIDE OF THE INHIBITOR MOLECULE RATHER THAN TO MAKE INTERACTIONS WITH THE TARGET ENZYMES.
ChainResidue
ASER98
AASN99
AGLU100
ACYS101
AGLU102

Functional Information from PROSITE/UniProt
site_idPS00999
Number of Residues19
DetailsSSI Streptomyces subtilisin-type inhibitors signature. CaPgpsGtHPaagsACAdL
ChainResidueDetails
ACYS35-LEU53

Functional Information from SwissProt/UniProt
site_idSWS_FT_FI1
Number of Residues1
DetailsSITE: Reactive bond for subtilisin
ChainResidueDetails
AMET73

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PDB entries from 2024-10-30

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