A0A1G6I4S6 · A0A1G6I4S6_9BACT
- ProteinMethionine aminopeptidase
- Genemap
- StatusUniProtKB unreviewed (TrEMBL)
- Organism
- Amino acids255 (go to sequence)
- Protein existenceInferred from homology
- Annotation score3/5
Function
function
Removes the N-terminal methionine from nascent proteins. The N-terminal methionine is often cleaved when the second residue in the primary sequence is small and uncharged (Met-Ala-, Cys, Gly, Pro, Ser, Thr, or Val). Requires deformylation of the N(alpha)-formylated initiator methionine before it can be hydrolyzed.
Catalytic activity
Cofactor
Zn2+ (UniProtKB | Rhea| CHEBI:29105 )
Mn2+ (UniProtKB | Rhea| CHEBI:29035 )
Fe2+ (UniProtKB | Rhea| CHEBI:29033 )
Note: Binds 2 divalent metal cations per subunit. Has a high-affinity and a low affinity metal-binding site. The true nature of the physiological cofactor is under debate. The enzyme is active with cobalt, zinc, manganese or divalent iron ions. Most likely, methionine aminopeptidases function as mononuclear Fe2+-metalloproteases under physiological conditions, and the catalytically relevant metal-binding site has been assigned to the histidine-containing high-affinity site.
Features
Showing features for binding site.
Type | ID | Position(s) | Description | |||
---|---|---|---|---|---|---|
Binding site | 78 | substrate | ||||
Sequence: H | ||||||
Binding site | 96 | a divalent metal cation 1 (UniProtKB | ChEBI) | ||||
Sequence: D | ||||||
Binding site | 107 | a divalent metal cation 1 (UniProtKB | ChEBI) | ||||
Sequence: D | ||||||
Binding site | 107 | a divalent metal cation 2 (UniProtKB | ChEBI); catalytic | ||||
Sequence: D | ||||||
Binding site | 170 | a divalent metal cation 2 (UniProtKB | ChEBI); catalytic | ||||
Sequence: H | ||||||
Binding site | 177 | substrate | ||||
Sequence: H | ||||||
Binding site | 203 | a divalent metal cation 2 (UniProtKB | ChEBI); catalytic | ||||
Sequence: E | ||||||
Binding site | 234 | a divalent metal cation 2 (UniProtKB | ChEBI); catalytic | ||||
Sequence: E | ||||||
Binding site | 234 | a divalent metal cation 1 (UniProtKB | ChEBI) | ||||
Sequence: E |
GO annotations
Aspect | Term | |
---|---|---|
Cellular Component | cytosol | |
Molecular Function | initiator methionyl aminopeptidase activity | |
Molecular Function | metalloaminopeptidase activity | |
Molecular Function | transition metal ion binding | |
Biological Process | proteolysis |
Keywords
- Molecular function
- Ligand
Enzyme and pathway databases
Names & Taxonomy
Protein names
- Recommended nameMethionine aminopeptidase
- EC number
- Short namesMAP ; MetAP
- Alternative names
Gene names
Organism names
- Organism
- Strains
- Taxonomic lineageBacteria > Thermotogota > Thermotogae > Petrotogales > Petrotogaceae > Geotoga
Accessions
- Primary accessionA0A1G6I4S6
Proteomes
Subcellular Location
UniProt Annotation
GO Annotation
Interaction
Structure
Family & Domains
Features
Showing features for domain.
Type | ID | Position(s) | Description | |||
---|---|---|---|---|---|---|
Domain | 11-241 | Peptidase M24 | ||||
Sequence: EKMRRAGEHLARLLDVVLPQIIKQGNNAEQVEEFVLQFIDEIGGTPTFKGYNGYPYATNVSVNEEVIHGFPTKDKIFKNGDIVSVDCGITLDGYIADSARTYYVGEISESEKKLINTTYEALLVGVEKAIIGNRIGDISNAIQKYVEDKGFSVIRDFVGHGVGRKLHEDPQVPNFGKEGKGPKLRKNMTLAIEPMVSMGDFNVQILEDGWTTITEDKSKAAHFEYTIVVTE |
Sequence similarities
Belongs to the peptidase M24A family. Methionine aminopeptidase type 1 subfamily.
Phylogenomic databases
Family and domain databases
Sequence
- Sequence statusComplete
- Length255
- Mass (Da)28,279
- Last updated2017-11-22 v1
- ChecksumC2E9C146D59518E7
Keywords
- Technical term