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Protein

S-adenosylmethionine decarboxylase proenzyme

Gene

speH

Organism
Methanococcus aeolicus (strain ATCC BAA-1280 / DSM 17508 / OCM 812 / Nankai-3)
Status
Reviewed-Annotation score: Annotation score: 3 out of 5-Protein inferred from homologyi

Functioni

Catalyzes the decarboxylation of S-adenosylmethionine to S-adenosylmethioninamine (dcAdoMet), the propylamine donor required for the synthesis of the polyamines spermine and spermidine from the diamine putrescine.UniRule annotation

Catalytic activityi

S-adenosyl-L-methionine = S-adenosyl 3-(methylthio)propylamine + CO2.UniRule annotation

Cofactori

pyruvateUniRule annotationNote: Binds 1 pyruvoyl group covalently per subunit.UniRule annotation

Pathwayi: S-adenosylmethioninamine biosynthesis

This protein is involved in step 1 of the subpathway that synthesizes S-adenosylmethioninamine from S-adenosyl-L-methionine.UniRule annotation
Proteins known to be involved in this subpathway in this organism are:
  1. S-adenosylmethionine decarboxylase proenzyme (speH)
This subpathway is part of the pathway S-adenosylmethioninamine biosynthesis, which is itself part of Amine and polyamine biosynthesis.
View all proteins of this organism that are known to be involved in the subpathway that synthesizes S-adenosylmethioninamine from S-adenosyl-L-methionine, the pathway S-adenosylmethioninamine biosynthesis and in Amine and polyamine biosynthesis.

Sites

Feature keyPosition(s)LengthDescriptionGraphical viewFeature identifierActions
Active sitei63 – 631Schiff-base intermediate with substrate; via pyruvic acidUniRule annotation
Active sitei68 – 681Proton acceptor; for processing activityUniRule annotation
Active sitei83 – 831Proton donor; for catalytic activityUniRule annotation

GO - Molecular functioni

GO - Biological processi

Complete GO annotation...

Keywords - Molecular functioni

Decarboxylase, Lyase

Keywords - Biological processi

Polyamine biosynthesis, Spermidine biosynthesis

Keywords - Ligandi

Pyruvate, S-adenosyl-L-methionine, Schiff base

Enzyme and pathway databases

BioCyciMAEO419665:GHVZ-606-MONOMER.
UniPathwayiUPA00331; UER00451.

Names & Taxonomyi

Protein namesi
Recommended name:
S-adenosylmethionine decarboxylase proenzymeUniRule annotation (EC:4.1.1.50UniRule annotation)
Short name:
AdoMetDCUniRule annotation
Short name:
SAMDCUniRule annotation
Cleaved into the following 2 chains:
S-adenosylmethionine decarboxylase beta chainUniRule annotation
S-adenosylmethionine decarboxylase alpha chainUniRule annotation
Gene namesi
Name:speHUniRule annotation
Ordered Locus Names:Maeo_0603
OrganismiMethanococcus aeolicus (strain ATCC BAA-1280 / DSM 17508 / OCM 812 / Nankai-3)
Taxonomic identifieri419665 [NCBI]
Taxonomic lineageiArchaeaEuryarchaeotaMethanococciMethanococcalesMethanococcaceaeMethanococcus
Proteomesi
  • UP000001106 Componenti: Chromosome

PTM / Processingi

Molecule processing

Feature keyPosition(s)LengthDescriptionGraphical viewFeature identifierActions
Chaini1 – 6262S-adenosylmethionine decarboxylase beta chainUniRule annotationPRO_1000013675Add
BLAST
Chaini63 – 11755S-adenosylmethionine decarboxylase alpha chainUniRule annotationPRO_0000315037Add
BLAST

Amino acid modifications

Feature keyPosition(s)LengthDescriptionGraphical viewFeature identifierActions
Modified residuei63 – 631Pyruvic acid (Ser); by autocatalysisUniRule annotation

Post-translational modificationi

Is synthesized initially as an inactive proenzyme. Formation of the active enzyme involves a self-maturation process in which the active site pyruvoyl group is generated from an internal serine residue via an autocatalytic post-translational modification. Two non-identical subunits are generated from the proenzyme in this reaction, and the pyruvate is formed at the N-terminus of the alpha chain, which is derived from the carboxyl end of the proenzyme. The post-translation cleavage follows an unusual pathway, termed non-hydrolytic serinolysis, in which the side chain hydroxyl group of the serine supplies its oxygen atom to form the C-terminus of the beta chain, while the remainder of the serine residue undergoes an oxidative deamination to produce ammonia and the pyruvoyl group blocking the N-terminus of the alpha chain.UniRule annotation

Sites

Feature keyPosition(s)LengthDescriptionGraphical viewFeature identifierActions
Sitei62 – 632Cleavage (non-hydrolytic); by autolysisUniRule annotation

Keywords - PTMi

Autocatalytic cleavage, Zymogen

Interactioni

Subunit structurei

Heterotetramer of two alpha and two beta chains arranged as a dimer of alpha/beta heterodimers.UniRule annotation

Protein-protein interaction databases

STRINGi419665.Maeo_0603.

Structurei

3D structure databases

ProteinModelPortaliA6UUL6.
ModBaseiSearch...
MobiDBiSearch...

Family & Domainsi

Sequence similaritiesi

Belongs to the prokaryotic AdoMetDC family. Type 1 subfamily.UniRule annotation

Phylogenomic databases

eggNOGiarCOG00279. Archaea.
COG1586. LUCA.
HOGENOMiHOG000216579.
KOiK01611.
OMAiINPWDAC.

Family and domain databases

Gene3Di3.60.90.10. 1 hit.
HAMAPiMF_00464. AdoMetDC_1. 1 hit.
InterProiIPR003826. AdoMetDC_fam_prok.
IPR016067. S-AdoMet_deCO2ase_core.
IPR017716. S-AdoMet_deCOase_pro-enz.
[Graphical view]
PfamiPF02675. AdoMet_dc. 1 hit.
[Graphical view]
SUPFAMiSSF56276. SSF56276. 1 hit.
TIGRFAMsiTIGR03330. SAM_DCase_Bsu. 1 hit.

Sequencei

Sequence statusi: Complete.

Sequence processingi: The displayed sequence is further processed into a mature form.

A6UUL6-1 [UniParc]FASTAAdd to basket

« Hide

        10         20         30         40         50
MKHLGKHLIM ELWDCDKQAL DNQAGVEKML EDATNSCGAT LICIRTHKFS
60 70 80 90 100
PQGVTGVAVL AESHISIHTW PEIGYAAMDI FTCGEHVNPE DAIPAIRDFL
110
KPAKFDIIDI KRGSMVE
Length:117
Mass (Da):12,947
Last modified:August 21, 2007 - v1
Checksum:i4ECBDB81A005BD8E
GO

Sequence databases

Select the link destinations:
EMBLi
GenBanki
DDBJi
Links Updated
CP000743 Genomic DNA. Translation: ABR56188.1.

Genome annotation databases

EnsemblBacteriaiABR56188; ABR56188; Maeo_0603.
KEGGimae:Maeo_0603.

Cross-referencesi

Sequence databases

Select the link destinations:
EMBLi
GenBanki
DDBJi
Links Updated
CP000743 Genomic DNA. Translation: ABR56188.1.

3D structure databases

ProteinModelPortaliA6UUL6.
ModBaseiSearch...
MobiDBiSearch...

Protein-protein interaction databases

STRINGi419665.Maeo_0603.

Protocols and materials databases

Structural Biology KnowledgebaseSearch...

Genome annotation databases

EnsemblBacteriaiABR56188; ABR56188; Maeo_0603.
KEGGimae:Maeo_0603.

Phylogenomic databases

eggNOGiarCOG00279. Archaea.
COG1586. LUCA.
HOGENOMiHOG000216579.
KOiK01611.
OMAiINPWDAC.

Enzyme and pathway databases

UniPathwayiUPA00331; UER00451.
BioCyciMAEO419665:GHVZ-606-MONOMER.

Family and domain databases

Gene3Di3.60.90.10. 1 hit.
HAMAPiMF_00464. AdoMetDC_1. 1 hit.
InterProiIPR003826. AdoMetDC_fam_prok.
IPR016067. S-AdoMet_deCO2ase_core.
IPR017716. S-AdoMet_deCOase_pro-enz.
[Graphical view]
PfamiPF02675. AdoMet_dc. 1 hit.
[Graphical view]
SUPFAMiSSF56276. SSF56276. 1 hit.
TIGRFAMsiTIGR03330. SAM_DCase_Bsu. 1 hit.
ProtoNetiSearch...

Entry informationi

Entry nameiSPEH_META3
AccessioniPrimary (citable) accession number: A6UUL6
Entry historyi
Integrated into UniProtKB/Swiss-Prot: January 15, 2008
Last sequence update: August 21, 2007
Last modified: July 6, 2016
This is version 56 of the entry and version 1 of the sequence. [Complete history]
Entry statusiReviewed (UniProtKB/Swiss-Prot)
Annotation programProkaryotic Protein Annotation Program

Miscellaneousi

Keywords - Technical termi

Complete proteome, Reference proteome

Documents

  1. PATHWAY comments
    Index of metabolic and biosynthesis pathways
  2. SIMILARITY comments
    Index of protein domains and families

Similar proteinsi

Links to similar proteins from the UniProt Reference Clusters (UniRef) at 100%, 90% and 50% sequence identity:
100%UniRef100 combines identical sequences and sub-fragments with 11 or more residues from any organism into one UniRef entry.
90%UniRef90 is built by clustering UniRef100 sequences that have at least 90% sequence identity to, and 80% overlap with, the longest sequence (a.k.a seed sequence).
50%UniRef50 is built by clustering UniRef90 seed sequences that have at least 50% sequence identity to, and 80% overlap with, the longest sequence in the cluster.