Annotations: 1GCB

Domain Annotation: SCOP/SCOPe Classification SCOP-e Database Homepage

Chains	Domain Info	Class	Fold	Superfamily	Family	Domain	Species	Provenance Source (Version)
A	d1gcba_	Alpha and beta proteins (a+b)	Cysteine proteinases	Cysteine proteinases	Papain-like	Bleomycin hydrolase	baker's yeast (Saccharomyces cerevisiae ) [TaxId: 4932 ],	SCOPe (2.08)

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

Chains	Type	Family Name	Domain Identifier	Family Identifier	Provenance Source (Version)
A	SCOP2B Superfamily	Cysteine proteinases	8033997	3001808	SCOP2B (2022-06-29)

Domain Annotation: ECOD Classification ECOD Database Homepage

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
A	Peptidase_C1	e1gcbA1	A: a+b complex topology	X: Cysteine proteinases-like	H: Cysteine proteinases (From Topology)	T: Cysteine proteinases	F: Peptidase_C1	ECOD (1.6)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
A	3.90.70.10	Alpha Beta	Alpha-Beta Complex	Cathepsin B	Chain A	CATH (4.3.0)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A	PF03051	Peptidase C1-like family (Peptidase_C1_2)	Peptidase C1-like family	-	Family

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A	GAL6 HG (EMTS) DERIVATIVE	RNA binding binding nucleic acid binding mRNA binding DNA binding double-stranded DNA binding sequence-specific DNA binding RNA polymerase II transcription regulatory region sequence-specific DNA binding cis-regulatory region sequence-specific DNA binding sequence-specific double-stranded DNA binding transcription cis-regulatory region binding transcription regulatory region nucleic acid binding RNA polymerase II cis-regulatory region sequence-specific DNA binding cysteine-type peptidase activity RNA binding binding nucleic acid binding mRNA binding DNA binding double-stranded DNA binding sequence-specific DNA binding RNA polymerase II transcription regulatory region sequence-specific DNA binding cis-regulatory region sequence-specific DNA binding sequence-specific double-stranded DNA binding transcription cis-regulatory region binding transcription regulatory region nucleic acid binding RNA polymerase II cis-regulatory region sequence-specific DNA binding cysteine-type peptidase activity peptidase activity catalytic activity, acting on a protein cysteine-type endopeptidase activity hydrolase activity catalytic activity endopeptidase activity cysteine-type aminopeptidase activity aminopeptidase activity cysteine-type exopeptidase activity exopeptidase activity single-stranded DNA binding	response to stimulus response to chemical response to antibiotic regulation of cellular process negative regulation of biological process RNA metabolic process regulation of primary metabolic process negative regulation of RNA biosynthetic process RNA biosynthetic process nucleobase-containing compound metabolic process DNA-templated transcription nucleic acid biosynthetic process regulation of RNA metabolic process transcription by RNA polymerase II response to stimulus response to chemical response to antibiotic regulation of cellular process negative regulation of biological process RNA metabolic process regulation of primary metabolic process negative regulation of RNA biosynthetic process RNA biosynthetic process nucleobase-containing compound metabolic process DNA-templated transcription nucleic acid biosynthetic process regulation of RNA metabolic process transcription by RNA polymerase II negative regulation of cellular process negative regulation of nucleobase-containing compound metabolic process regulation of nucleobase-containing compound metabolic process regulation of RNA biosynthetic process negative regulation of macromolecule metabolic process regulation of biosynthetic process regulation of transcription by RNA polymerase II negative regulation of DNA-templated transcription regulation of biological process negative regulation of transcription by RNA polymerase II negative regulation of metabolic process biological regulation primary metabolic process regulation of macromolecule metabolic process nucleobase-containing compound biosynthetic process gene expression macromolecule biosynthetic process nucleic acid metabolic process regulation of gene expression biosynthetic process negative regulation of biosynthetic process negative regulation of macromolecule biosynthetic process metabolic process cellular process regulation of macromolecule biosynthetic process macromolecule metabolic process regulation of DNA-templated transcription regulation of metabolic process negative regulation of RNA metabolic process proteolysis protein metabolic process response to toxic substance catabolic process oxoacid metabolic process sulfur amino acid metabolic process amino acid metabolic process organic acid catabolic process organic acid metabolic process alpha-amino acid metabolic process homocysteine catabolic process cellular catabolic process non-proteinogenic amino acid metabolic process carboxylic acid catabolic process small molecule metabolic process sulfur compound metabolic process amino acid catabolic process homocysteine metabolic process non-proteinogenic amino acid catabolic process carboxylic acid metabolic process sulfur compound catabolic process alpha-amino acid catabolic process sulfur amino acid catabolic process small molecule catabolic process	membrane-bounded organelle intracellular organelle cellular anatomical structure intracellular anatomical structure mitochondrion organelle cytoplasm intracellular membrane-bounded organelle

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A	IPR000169	Cysteine peptidase, cysteine active site	Active Site
A	IPR038765	Papain-like cysteine peptidase superfamily	Homologous Superfamily
A	IPR004134	Peptidase C1B, bleomycin hydrolase	Family
A	IPR025660	Cysteine peptidase, histidine active site	Active Site

Structure Motif Annotation: Mechanism and Catalytic Site Atlas M-CSA Database Homepage

Chains	Enzyme Name	Description	Catalytic Residues
A	bleomycin hydrolase M-CSA #624	Bleomycin hydrolase is an aminopeptidase identified in eukaryotes ranging from yeast to mammals. It was originally discovered by its ability to hydrolyse the anti-cancer drug bleomycin, thus limiting the usefulness of this drug in the cell. The yeast enzyme (Gal6p) has been shown to negatively regulate the galactose metabolism system and to bind single-stranded DNA and RNA with high affinity; this binding coupled with the hydrolase activity has a role in the detoxification of bleomycin. Generation of the mature form of Gal6p involves the enzyme initially acting as a carboxypeptidase on its own C terminus to convert itself to an aminopeptidase.	Defined by 4 residues: GLN:A-67CYS:A-73HIS:A-369ASN:A-392 \| Explore in 3D: M-CSA Motif Definition Search M-CSA Motif EC: 3.4.22.40 (UniProt) Search M-CSA Motif + EC 3.4.22.40

RCSB PDB Core Operations are funded by the U.S. National Science Foundation (DBI-2321666), the US Department of Energy (DE-SC0019749), and the National Cancer Institute, National Institute of Allergy and Infectious Diseases, and National Institute of General Medical Sciences of the National Institutes of Health under grant R01GM157729.