UniProtKB - P50244 (DCAMC_TRYBB)
Protein
S-adenosylmethionine decarboxylase proenzyme
Gene
N/A
Organism
Trypanosoma brucei brucei
Status
Functioni
In association with the catalytically inactive AdoMetDC prozyme, catalyzes the decarboxylation of S-adenosyl-L-methionine which is essential for the biosynthesis of the polyamine spermidine. Required for growth and survival during the bloodstream life cycle stage (PubMed:18949025).2 Publications
Catalytic activityi
- EC:4.1.1.502 Publications
Cofactori
pyruvateNote: Binds 1 pyruvoyl group covalently per subunit.
Activity regulationi
Allosterically activated by AdoMetDC prozyme. Activated by putrescine and to a lesser extent by spermidine, norspermidine and spermine. Inhibited by 5'-([(Z)-4-amino-2-butenyl]methylamino)-5'-deoxyadenosine (MDL 73811).1 Publication
Kineticsi
- KM=0.38 mM for S-adenosyl-L-methionine (at 37 degrees Celsius)1 Publication
- KM=0.24 mM for S-adenosyl-L-methionine (in presence of putrescine and at 37 degrees Celsius)1 Publication
- KM=0.11 mM for S-adenosyl-L-methionine (in presence of AdoMetDC prozyme and at 37 degrees Celsius)1 Publication
- KM=0.17 mM for S-adenosyl-L-methionine (in presence of AdoMetDC prozyme and putrescine and at 37 degrees Celsius)1 Publication
: S-adenosylmethioninamine biosynthesis Pathwayi
This protein is involved in step 1 of the subpathway that synthesizes S-adenosylmethioninamine from S-adenosyl-L-methionine.2 PublicationsProteins known to be involved in this subpathway in this organism are:
- Inactive S-adenosylmethionine decarboxylase prozyme, S-adenosylmethionine decarboxylase proenzyme
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 key | Position(s) | DescriptionActions | Graphical view | Length |
---|---|---|---|---|
Binding sitei | 28 | SubstrateBy similarity | 1 | |
Active sitei | 29 | By similarity | 1 | |
Active sitei | 32 | By similarity | 1 | |
Binding sitei | 85 | SubstrateBy similarity | 1 | |
Active sitei | 86 | Schiff-base intermediate with substrate; via pyruvic acidBy similarity | 1 | |
Active sitei | 100 | Proton donor; for catalytic activityBy similarity | 1 | |
Active sitei | 249 | Proton acceptor; for processing activityBy similarity | 1 | |
Active sitei | 262 | Proton acceptor; for processing activityBy similarity | 1 | |
Binding sitei | 266 | SubstrateBy similarity | 1 |
GO - Molecular functioni
- adenosylmethionine decarboxylase activity Source: UniProtKB
- protein heterodimerization activity Source: UniProtKB
GO - Biological processi
- negative regulation of gene expression Source: UniProtKB
- positive regulation of cell aging Source: UniProtKB
- positive regulation of spermidine biosynthetic process Source: UniProtKB
- positive regulation of trypanothione biosynthetic process Source: UniProtKB
- S-adenosylmethioninamine biosynthetic process Source: UniProtKB-UniPathway
- S-adenosylmethioninamine metabolic process Source: UniProtKB
- S-adenosylmethionine metabolic process Source: UniProtKB
- spermidine biosynthetic process Source: UniProtKB-KW
- spermine biosynthetic process Source: InterPro
Keywordsi
Molecular function | Decarboxylase, Lyase |
Biological process | Polyamine biosynthesis, Spermidine biosynthesis |
Ligand | Pyruvate, S-adenosyl-L-methionine, Schiff base |
Enzyme and pathway databases
BRENDAi | 4.1.1.50, 6519 |
SABIO-RKi | P50244 |
UniPathwayi | UPA00331;UER00451 |
Names & Taxonomyi
Protein namesi | Recommended name: S-adenosylmethionine decarboxylase proenzyme (EC:4.1.1.502 Publications)Short name: AdoMetDC Short name: SAMDC Cleaved into the following 2 chains: |
Organismi | Trypanosoma brucei brucei |
Taxonomic identifieri | 5702 [NCBI] |
Taxonomic lineagei | Eukaryota › Discoba › Euglenozoa › Kinetoplastea › Metakinetoplastina › Trypanosomatida › Trypanosomatidae › Trypanosoma › |
Pathology & Biotechi
Disruption phenotypei
RNAi-mediated knockdown causes cell growth arrest followed by death. Putrescine levels are increased and the production of spermidine, glutathionyl-spermidine and trypanothione is severely reduced. In addition, expression levels of AdoMetDC prozyme and ornithine carboxylase (ODC) are increased.1 Publication
Chemistry databases
ChEMBLi | CHEMBL4105987 |
PTM / Processingi
Molecule processing
Feature key | Position(s) | DescriptionActions | Graphical view | Length |
---|---|---|---|---|
ChainiPRO_0000029983 | 1 – 85 | S-adenosylmethionine decarboxylase beta chainBy similarityAdd BLAST | 85 | |
ChainiPRO_0000029984 | 86 – 370 | S-adenosylmethionine decarboxylase alpha chainBy similarityAdd BLAST | 285 |
Amino acid modifications
Feature key | Position(s) | DescriptionActions | Graphical view | Length |
---|---|---|---|---|
Modified residuei | 86 | Pyruvic acid (Ser); by autocatalysisBy similarity | 1 |
Post-translational modificationi
Is synthesized initially as an inactive proenzyme (PubMed:17485680). 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 (By similarity). 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 (By similarity). 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 (By similarity).By similarity1 Publication
Sites
Feature key | Position(s) | DescriptionActions | Graphical view | Length |
---|---|---|---|---|
Sitei | 85 – 86 | Cleavage (non-hydrolytic); by autolysisBy similarity | 2 |
Keywords - PTMi
Autocatalytic cleavage, ZymogenExpressioni
Developmental stagei
Expressed during both bloodstream (BF) and procyclic insect (PF) life cycle stages.1 Publication
Interactioni
Subunit structurei
Forms a heterodimer with catalytically inactive AdoMetDC prozyme; heterodimerization is required to activate AdoMetDC.
1 PublicationGO - Molecular functioni
- protein heterodimerization activity Source: UniProtKB
Family & Domainsi
Sequence similaritiesi
Belongs to the eukaryotic AdoMetDC family.Curated
Family and domain databases
InterProi | View protein in InterPro IPR001985, S-AdoMet_decarboxylase IPR016067, S-AdoMet_deCO2ase_core IPR018166, S-AdoMet_deCO2ase_CS |
PANTHERi | PTHR11570, PTHR11570, 1 hit |
Pfami | View protein in Pfam PF01536, SAM_decarbox, 1 hit |
PIRSFi | PIRSF001355, S-AdenosylMet_decarboxylase, 1 hit |
SUPFAMi | SSF56276, SSF56276, 1 hit |
PROSITEi | View protein in PROSITE PS01336, ADOMETDC, 1 hit |
i Sequence
Sequence statusi: Complete.
: The displayed sequence is further processed into a mature form. Sequence processingi
P50244-1 [UniParc]FASTAAdd to basket
10 20 30 40 50
MSSCKDSLSL MAMWGSIARF DPKHERSFEG PEKRLEVIMR VVDGTHVSGL
60 70 80 90 100
LAHDDDVWQK VIDAICAHIV SREFNEYIRS YVLSESSLFV MKDRVILITC
110 120 130 140 150
GTITLLNCVP LICEAVSTVC GEVEWVSFMH KNYSFPWEQK GPHLSMAEEF
160 170 180 190 200
KTLRSHFPSG QPFIFGPIDS DHYFLYFHSD VVQPSCSDDA QLSMTMYGLD
210 220 230 240 250
RNQTKHWYSD KMLPTGPETA VIREATGLSE VVDDSWILHD LQYEPCGYSI
260 270 280 290 300
NAIRGSEYQT IHITPEEHCS FASYETNTCA LNYSKCICGV LRVFDPERFS
310 320 330 340 350
VIVFIDPDSA VGKSYHSGGT IGVEPEYYPN YEAHHRTVNE YTPGHWVLKV
360 370
NYVKRAVGTV GTSAASGAKE
Experimental Info
Feature key | Position(s) | DescriptionActions | Graphical view | Length |
---|---|---|---|---|
Sequence conflicti | 177 – 178 | FH → LD in ABQ23690 (PubMed:17485680).Curated | 2 |
Sequence databases
Select the link destinations: EMBLi GenBanki DDBJi Links Updated | EF545595 mRNA Translation: ABQ23690.1 U20092 Genomic DNA Translation: AAA61969.1 |
Genome annotation databases
EnsemblProtistsi | AAZ11999; AAZ11999; Tb927.6.4410 AAZ12004; AAZ12004; Tb927.6.4460 |
Similar proteinsi
Cross-referencesi
Sequence databases
Select the link destinations: EMBLi GenBanki DDBJi Links Updated | EF545595 mRNA Translation: ABQ23690.1 U20092 Genomic DNA Translation: AAA61969.1 |
3D structure databases
SMRi | P50244 |
ModBasei | Search... |
Chemistry databases
ChEMBLi | CHEMBL4105987 |
Genome annotation databases
EnsemblProtistsi | AAZ11999; AAZ11999; Tb927.6.4410 AAZ12004; AAZ12004; Tb927.6.4460 |
Enzyme and pathway databases
UniPathwayi | UPA00331;UER00451 |
BRENDAi | 4.1.1.50, 6519 |
SABIO-RKi | P50244 |
Family and domain databases
InterProi | View protein in InterPro IPR001985, S-AdoMet_decarboxylase IPR016067, S-AdoMet_deCO2ase_core IPR018166, S-AdoMet_deCO2ase_CS |
PANTHERi | PTHR11570, PTHR11570, 1 hit |
Pfami | View protein in Pfam PF01536, SAM_decarbox, 1 hit |
PIRSFi | PIRSF001355, S-AdenosylMet_decarboxylase, 1 hit |
SUPFAMi | SSF56276, SSF56276, 1 hit |
PROSITEi | View protein in PROSITE PS01336, ADOMETDC, 1 hit |
ProtoNeti | Search... |
MobiDBi | Search... |
Entry informationi
Entry namei | DCAMC_TRYBB | |
Accessioni | P50244Primary (citable) accession number: P50244 Secondary accession number(s): A5HNV7 | |
Entry historyi | Integrated into UniProtKB/Swiss-Prot: | October 1, 1996 |
Last sequence update: | February 15, 2017 | |
Last modified: | August 12, 2020 | |
This is version 82 of the entry and version 2 of the sequence. See complete history. | ||
Entry statusi | Reviewed (UniProtKB/Swiss-Prot) |
Miscellaneousi
Documents
- PATHWAY comments
Index of metabolic and biosynthesis pathways - SIMILARITY comments
Index of protein domains and families