| IED ID | IndEnz0002012805 |
| Enzyme Type ID | protease012805 |
| Protein Name |
Phosphatidylserine decarboxylase proenzyme 3 EC 4.1.1.65 Cleaved into: Phosphatidylserine decarboxylase 3 beta chain; Phosphatidylserine decarboxylase 3 alpha chain |
| Gene Name | PSD3 At4g25970 F20B18.80 |
| Organism | Arabidopsis thaliana (Mouse-ear cress) |
| Taxonomic Lineage | cellular organisms Eukaryota Viridiplantae Streptophyta Streptophytina Embryophyta Tracheophyta Euphyllophyta Spermatophyta Magnoliopsida Mesangiospermae eudicotyledons Gunneridae Pentapetalae rosids malvids Brassicales Brassicaceae Camelineae Arabidopsis Arabidopsis thaliana (Mouse-ear cress) |
| Enzyme Sequence | MGNGNSTETKESRRSKMRKKIQNFRSRRRLSRPGSGSVSGLASQRSVSADDFAGIALLTLIGAEMKFKDKWLACVSFGEQTFRSEISDSTEKPIWNSEKKLLLEKNGPSLARISVFETNRLLKNNIVGYCELDLLDFVVQEPDSTCKSFDLLDPASSNVVGSMFVSCSVEDPVETETCFAKRILSIVDYDEDGKLSFSEFSDLMNAFGNVVAANKKEELFKAADLNGDGVVTIDELAALLAVQQEQEPIINSCPVCGEALQLDKLNAMIHMTLCFDEGTGNQMTGGFLTDRQASYGWMFKLSEWTHLSTYDVGLNTGSSASHIVVIDRKTKRLVEELIDSKIVMSMRAIYQSKIGLRLMDQGAKEILQNLSEKQGKKMNSVESAQNIPSFLEFFKDQINMAEVKYPLDHFKTFNEFFVRELKPGARPIACMDQDDVAVSAADCRLMAFQSVDDSTRFWIKGRKFSIKGLLGNDVQSDAFLDGSLVIFRLAPQDYHRFHSPVSGVIEKFVNVSGSLYTVNPIAVNSKYCNVFTENKRTIVIISTAEFGKVAFVAIGATMVGSISFVRQEGDHVKKGDELGYFSFGGSTVICVFEKDSIKIDEDLLANSARSLETLVTVGMQLGVSFPKLENCVLEP |
| Enzyme Length | 635 |
| Uniprot Accession Number | A4GNA8 |
| Absorption | |
| Active Site | ACT_SITE 442; /note=Charge relay system; for autoendoproteolytic cleavage activity; /evidence=ECO:0000255|HAMAP-Rule:MF_03209; ACT_SITE 498; /note=Charge relay system; for autoendoproteolytic cleavage activity; /evidence=ECO:0000255|HAMAP-Rule:MF_03209; ACT_SITE 586; /note=Charge relay system; for autoendoproteolytic cleavage activity; /evidence=ECO:0000255|HAMAP-Rule:MF_03209; ACT_SITE 586; /note=Schiff-base intermediate with substrate; via pyruvic acid; for decarboxylase activity; /evidence=ECO:0000255|HAMAP-Rule:MF_03209 |
| Activity Regulation | |
| Binding Site | |
| Calcium Binding | |
| catalytic Activity | CATALYTIC ACTIVITY: Reaction=a 1,2-diacyl-sn-glycero-3-phospho-L-serine + H(+) = a 1,2-diacyl-sn-glycero-3-phosphoethanolamine + CO2; Xref=Rhea:RHEA:20828, ChEBI:CHEBI:15378, ChEBI:CHEBI:16526, ChEBI:CHEBI:57262, ChEBI:CHEBI:64612; EC=4.1.1.65; Evidence={ECO:0000255|HAMAP-Rule:MF_03209}; |
| DNA Binding | |
| EC Number | 4.1.1.65 |
| Enzyme Function | FUNCTION: Catalyzes the formation of phosphatidylethanolamine (PtdEtn) from phosphatidylserine (PtdSer). Plays a central role in phospholipid metabolism and in the interorganelle trafficking of phosphatidylserine. Contributes only to a minor proportion of PtdEtn production. {ECO:0000255|HAMAP-Rule:MF_03209, ECO:0000269|PubMed:17449644}. |
| Temperature Dependency | |
| PH Dependency | |
| Pathway | PATHWAY: Phospholipid metabolism; phosphatidylethanolamine biosynthesis; phosphatidylethanolamine from CDP-diacylglycerol: step 2/2. {ECO:0000255|HAMAP-Rule:MF_03209}. |
| nucleotide Binding | |
| Features | Active site (4); Chain (3); Compositional bias (1); Domain (3); Erroneous gene model prediction (2); Initiator methionine (1); Lipidation (1); Metal binding (9); Modified residue (1); Region (1); Site (1) |
| Keywords | Calcium;Decarboxylase;Endoplasmic reticulum;Lipid biosynthesis;Lipid metabolism;Lipoprotein;Lyase;Membrane;Metal-binding;Myristate;Phospholipid biosynthesis;Phospholipid metabolism;Pyruvate;Reference proteome;Repeat;Zymogen |
| Interact With | |
| Induction | |
| Subcellular Location | SUBCELLULAR LOCATION: Endoplasmic reticulum membrane {ECO:0000305|PubMed:17449644}; Lipid-anchor {ECO:0000305}. |
| Modified Residue | MOD_RES 586; /note=Pyruvic acid (Ser); by autocatalysis; /evidence=ECO:0000255|HAMAP-Rule:MF_03209 |
| Post Translational Modification | PTM: 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 autoendoproteolytic cleavage occurs by a canonical serine protease mechanism, 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 prosthetic group on the alpha chain. During this reaction, the Ser that is part of the protease active site of the proenzyme becomes the pyruvoyl prosthetic group, which constitutes an essential element of the active site of the mature decarboxylase. {ECO:0000255|HAMAP-Rule:MF_03209}. |
| Signal Peptide | |
| Structure 3D | |
| Cross Reference PDB | - |
| Mapped Pubmed ID | 12372144; 12857846; 12912986; 14576160; 22645532; 23505340; 27247031; |
| Motif | |
| Gene Encoded By | |
| Mass | 70,352 |
| Kinetics | |
| Metal Binding | METAL 188; /note=Calcium 1; /evidence=ECO:0000255|HAMAP-Rule:MF_03209; METAL 190; /note=Calcium 1; /evidence=ECO:0000255|HAMAP-Rule:MF_03209; METAL 192; /note=Calcium 1; /evidence=ECO:0000255|HAMAP-Rule:MF_03209; METAL 194; /note=Calcium 1; /evidence=ECO:0000255|HAMAP-Rule:MF_03209; METAL 199; /note=Calcium 1; /evidence=ECO:0000255|HAMAP-Rule:MF_03209; METAL 224; /note=Calcium 2; /evidence=ECO:0000255|HAMAP-Rule:MF_03209; METAL 226; /note=Calcium 2; /evidence=ECO:0000255|HAMAP-Rule:MF_03209; METAL 228; /note=Calcium 2; /evidence=ECO:0000255|HAMAP-Rule:MF_03209; METAL 235; /note=Calcium 2; /evidence=ECO:0000255|HAMAP-Rule:MF_03209 |
| Rhea ID | RHEA:20828 |
| Cross Reference Brenda |