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1R23

Crystal structure of the cyanobacterial metallothionein repressor SmtB in the Zn1-form (one Zn(II) per dimer)

Functional Information from GO Data
ChainGOidnamespacecontents
A0003700molecular_functionDNA-binding transcription factor activity
A0006355biological_processregulation of DNA-templated transcription
B0003700molecular_functionDNA-binding transcription factor activity
B0006355biological_processregulation of DNA-templated transcription
Functional Information from PDB Data
site_idAC1
Number of Residues4
DetailsBINDING SITE FOR RESIDUE ZN B 501
ChainResidue
AASP104
AHIS106
BHIS117
BGLU120

Functional Information from PROSITE/UniProt
site_idPS00846
Number of Residues19
DetailsHTH_ARSR_1 Bacterial regulatory proteins, arsR family signature. CvgDLaqaigvSesavSHQ
ChainResidueDetails
ACYS61-GLN79

Functional Information from SwissProt/UniProt
site_idSWS_FT_FI1
Number of Residues38
DetailsDNA binding: {"description":"H-T-H motif","evidences":[{"source":"PROSITE-ProRule","id":"PRU00340","evidenceCode":"ECO:0000255"}]}
ChainResidueDetails

site_idSWS_FT_FI2
Number of Residues8
DetailsBinding site: {}
ChainResidueDetails

253389

PDB entries from 2026-05-13

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