ID M7BAG0_CHEMY Unreviewed; 336 AA.
AC M7BAG0;
DT 29-MAY-2013, integrated into UniProtKB/TrEMBL.
DT 29-MAY-2013, sequence version 1.
DT 24-JAN-2024, entry version 43.
DE RecName: Full=Phosphatidylserine decarboxylase proenzyme, mitochondrial {ECO:0000256|HAMAP-Rule:MF_03208};
DE EC=4.1.1.65 {ECO:0000256|HAMAP-Rule:MF_03208};
DE Contains:
DE RecName: Full=Phosphatidylserine decarboxylase beta chain {ECO:0000256|HAMAP-Rule:MF_03208};
DE Contains:
DE RecName: Full=Phosphatidylserine decarboxylase alpha chain {ECO:0000256|HAMAP-Rule:MF_03208};
GN Name=PISD {ECO:0000256|HAMAP-Rule:MF_03208};
GN ORFNames=UY3_08711 {ECO:0000313|EMBL:EMP34149.1};
OS Chelonia mydas (Green sea-turtle) (Chelonia agassizi).
OC Eukaryota; Metazoa; Chordata; Craniata; Vertebrata; Euteleostomi;
OC Archelosauria; Testudinata; Testudines; Cryptodira; Durocryptodira;
OC Americhelydia; Chelonioidea; Cheloniidae; Chelonia.
OX NCBI_TaxID=8469 {ECO:0000313|EMBL:EMP34149.1, ECO:0000313|Proteomes:UP000031443};
RN [1] {ECO:0000313|Proteomes:UP000031443}
RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RX PubMed=23624526; DOI=10.1038/ng.2615;
RA Wang Z., Pascual-Anaya J., Zadissa A., Li W., Niimura Y., Huang Z., Li C.,
RA White S., Xiong Z., Fang D., Wang B., Ming Y., Chen Y., Zheng Y.,
RA Kuraku S., Pignatelli M., Herrero J., Beal K., Nozawa M., Li Q., Wang J.,
RA Zhang H., Yu L., Shigenobu S., Wang J., Liu J., Flicek P., Searle S.,
RA Wang J., Kuratani S., Yin Y., Aken B., Zhang G., Irie N.;
RT "The draft genomes of soft-shell turtle and green sea turtle yield insights
RT into the development and evolution of the turtle-specific body plan.";
RL Nat. Genet. 45:701-706(2013).
CC -!- FUNCTION: Catalyzes the formation of phosphatidylethanolamine (PtdEtn)
CC from phosphatidylserine (PtdSer). Plays a central role in phospholipid
CC metabolism and in the interorganelle trafficking of phosphatidylserine.
CC {ECO:0000256|HAMAP-Rule:MF_03208}.
CC -!- CATALYTIC ACTIVITY:
CC Reaction=a 1,2-diacyl-sn-glycero-3-phospho-L-serine + H(+) = a 1,2-
CC diacyl-sn-glycero-3-phosphoethanolamine + CO2; Xref=Rhea:RHEA:20828,
CC ChEBI:CHEBI:15378, ChEBI:CHEBI:16526, ChEBI:CHEBI:57262,
CC ChEBI:CHEBI:64612; EC=4.1.1.65; Evidence={ECO:0000256|HAMAP-
CC Rule:MF_03208};
CC -!- COFACTOR:
CC Name=pyruvate; Xref=ChEBI:CHEBI:15361;
CC Evidence={ECO:0000256|HAMAP-Rule:MF_03208};
CC Note=Binds 1 pyruvoyl group covalently per subunit. {ECO:0000256|HAMAP-
CC Rule:MF_03208};
CC -!- PATHWAY: Lipid metabolism. {ECO:0000256|ARBA:ARBA00005189}.
CC -!- PATHWAY: Phospholipid metabolism; phosphatidylethanolamine
CC biosynthesis. {ECO:0000256|ARBA:ARBA00024326}.
CC -!- SUBUNIT: Heterodimer of a large membrane-associated beta subunit and a
CC small pyruvoyl-containing alpha subunit. {ECO:0000256|HAMAP-
CC Rule:MF_03208}.
CC -!- SUBCELLULAR LOCATION: Mitochondrion inner membrane
CC {ECO:0000256|ARBA:ARBA00004273}.
CC -!- SUBCELLULAR LOCATION: [Phosphatidylserine decarboxylase alpha chain]:
CC Mitochondrion inner membrane {ECO:0000256|HAMAP-Rule:MF_03208};
CC Peripheral membrane protein {ECO:0000256|HAMAP-Rule:MF_03208};
CC Intermembrane side {ECO:0000256|HAMAP-Rule:MF_03208}. Note=Anchored to
CC the mitochondrial inner membrane through its interaction with the
CC integral membrane beta chain. {ECO:0000256|HAMAP-Rule:MF_03208}.
CC -!- SUBCELLULAR LOCATION: [Phosphatidylserine decarboxylase beta chain]:
CC Mitochondrion inner membrane {ECO:0000256|HAMAP-Rule:MF_03208}; Single-
CC pass membrane protein {ECO:0000256|HAMAP-Rule:MF_03208}; Intermembrane
CC side {ECO:0000256|HAMAP-Rule:MF_03208}.
CC -!- PTM: Is synthesized initially as an inactive proenzyme. Formation of
CC the active enzyme involves a self-maturation process in which the
CC active site pyruvoyl group is generated from an internal serine residue
CC via an autocatalytic post-translational modification. Two non-identical
CC subunits are generated from the proenzyme in this reaction, and the
CC pyruvate is formed at the N-terminus of the alpha chain, which is
CC derived from the carboxyl end of the proenzyme. The autoendoproteolytic
CC cleavage occurs by a canonical serine protease mechanism, in which the
CC side chain hydroxyl group of the serine supplies its oxygen atom to
CC form the C-terminus of the beta chain, while the remainder of the
CC serine residue undergoes an oxidative deamination to produce ammonia
CC and the pyruvoyl prosthetic group on the alpha chain. During this
CC reaction, the Ser that is part of the protease active site of the
CC proenzyme becomes the pyruvoyl prosthetic group, which constitutes an
CC essential element of the active site of the mature decarboxylase.
CC {ECO:0000256|HAMAP-Rule:MF_03208}.
CC -!- SIMILARITY: Belongs to the phosphatidylserine decarboxylase family.
CC PSD-B subfamily. Eukaryotic type I sub-subfamily. {ECO:0000256|HAMAP-
CC Rule:MF_03208}.
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DR EMBL; KB533798; EMP34149.1; -; Genomic_DNA.
DR AlphaFoldDB; M7BAG0; -.
DR STRING; 8469.M7BAG0; -.
DR eggNOG; KOG2420; Eukaryota.
DR UniPathway; UPA00558; -.
DR Proteomes; UP000031443; Unassembled WGS sequence.
DR GO; GO:0005811; C:lipid droplet; IEA:UniProtKB-KW.
DR GO; GO:0005743; C:mitochondrial inner membrane; IEA:UniProtKB-SubCell.
DR GO; GO:0004609; F:phosphatidylserine decarboxylase activity; IEA:UniProtKB-UniRule.
DR GO; GO:0006646; P:phosphatidylethanolamine biosynthetic process; IEA:UniProtKB-UniRule.
DR GO; GO:0016540; P:protein autoprocessing; IEA:UniProtKB-UniRule.
DR HAMAP; MF_03208; PS_decarb_PSD_B_type1_euk; 1.
DR InterPro; IPR003817; PS_Dcarbxylase.
DR InterPro; IPR033177; PSD-B.
DR InterPro; IPR033661; PSD_type1_euk.
DR NCBIfam; TIGR00163; PS_decarb; 1.
DR PANTHER; PTHR10067; PHOSPHATIDYLSERINE DECARBOXYLASE; 1.
DR PANTHER; PTHR10067:SF6; PHOSPHATIDYLSERINE DECARBOXYLASE PROENZYME, MITOCHONDRIAL; 1.
DR Pfam; PF02666; PS_Dcarbxylase; 1.
PE 3: Inferred from homology;
KW Decarboxylase {ECO:0000256|ARBA:ARBA00022793, ECO:0000256|HAMAP-
KW Rule:MF_03208}; Lipid biosynthesis {ECO:0000256|HAMAP-Rule:MF_03208};
KW Lipid droplet {ECO:0000256|ARBA:ARBA00022677};
KW Lipid metabolism {ECO:0000256|HAMAP-Rule:MF_03208};
KW Lyase {ECO:0000256|ARBA:ARBA00023239, ECO:0000256|HAMAP-Rule:MF_03208};
KW Membrane {ECO:0000256|HAMAP-Rule:MF_03208};
KW Mitochondrion {ECO:0000256|HAMAP-Rule:MF_03208};
KW Mitochondrion inner membrane {ECO:0000256|HAMAP-Rule:MF_03208};
KW Phospholipid biosynthesis {ECO:0000256|HAMAP-Rule:MF_03208};
KW Phospholipid metabolism {ECO:0000256|HAMAP-Rule:MF_03208};
KW Pyruvate {ECO:0000256|HAMAP-Rule:MF_03208};
KW Reference proteome {ECO:0000313|Proteomes:UP000031443};
KW Transmembrane {ECO:0000256|ARBA:ARBA00022692, ECO:0000256|HAMAP-
KW Rule:MF_03208};
KW Transmembrane helix {ECO:0000256|ARBA:ARBA00022989, ECO:0000256|HAMAP-
KW Rule:MF_03208}; Zymogen {ECO:0000256|HAMAP-Rule:MF_03208}.
FT CHAIN 1..304
FT /note="Phosphatidylserine decarboxylase beta chain"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_03208"
FT /id="PRO_5023400367"
FT CHAIN 305..336
FT /note="Phosphatidylserine decarboxylase alpha chain"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_03208"
FT /id="PRO_5023400368"
FT TOPO_DOM 1..7
FT /note="Mitochondrial matrix"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_03208"
FT TOPO_DOM 27..336
FT /note="Mitochondrial intermembrane"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_03208"
FT ACT_SITE 118
FT /note="Charge relay system; for autoendoproteolytic
FT cleavage activity"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_03208"
FT ACT_SITE 194
FT /note="Charge relay system; for autoendoproteolytic
FT cleavage activity"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_03208"
FT ACT_SITE 305
FT /note="Charge relay system; for autoendoproteolytic
FT cleavage activity"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_03208"
FT ACT_SITE 305
FT /note="Schiff-base intermediate with substrate; via pyruvic
FT acid; for decarboxylase activity"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_03208"
FT SITE 304..305
FT /note="Cleavage (non-hydrolytic); by autocatalysis"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_03208"
FT MOD_RES 305
FT /note="Pyruvic acid (Ser); by autocatalysis"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_03208"
SQ SEQUENCE 336 AA; 38080 MW; 20B7D2B6FAE5860A CRC64;
MGGKSSTLSS ETLGEAISLS GSWALADERE EELQVSLYKS VPTRLLSRAW GRLNQVELPT
WLRKPVYSLY IWTFGVNMKE AAVEDLHHYR NLSEFFRRKL KPQSRPVCCY HSVISPSDGK
ILNFGQVKNC EVEQVKGVTY SLESFLGPCT STEDVQFSQT SSCNSFQNQL VTKEGNELYH
CVIYLAPGDY HCFHSPTDWR VSHRRHFPGS LMSVNPGVAR WIKELFCHNE RVVLTGDWKH
GFFSLTAVGA TNVGSIRIYF DRDLHTNSPC YSKGSYNDFS FITNNNKEGI PMRKGEHLGE
FNLGSTIVLI FEAPKDFNFH LKPGQKIRFG EALGSL
//
