ID A0A1Y1HXB9_KLENI Unreviewed; 328 AA.
AC A0A1Y1HXB9;
DT 30-AUG-2017, integrated into UniProtKB/TrEMBL.
DT 30-AUG-2017, sequence version 1.
DT 27-MAR-2024, entry version 23.
DE RecName: Full=Succinate--CoA ligase [ADP-forming] subunit alpha, mitochondrial {ECO:0000256|HAMAP-Rule:MF_03222};
DE EC=6.2.1.5 {ECO:0000256|HAMAP-Rule:MF_03222};
DE AltName: Full=Succinyl-CoA synthetase subunit alpha {ECO:0000256|HAMAP-Rule:MF_03222};
DE Short=SCS-alpha {ECO:0000256|HAMAP-Rule:MF_03222};
GN ORFNames=KFL_000850270 {ECO:0000313|EMBL:GAQ81611.1};
OS Klebsormidium nitens (Green alga) (Ulothrix nitens).
OC Eukaryota; Viridiplantae; Streptophyta; Klebsormidiophyceae;
OC Klebsormidiales; Klebsormidiaceae; Klebsormidium.
OX NCBI_TaxID=105231 {ECO:0000313|EMBL:GAQ81611.1, ECO:0000313|Proteomes:UP000054558};
RN [1] {ECO:0000313|EMBL:GAQ81611.1, ECO:0000313|Proteomes:UP000054558}
RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC STRAIN=NIES-2285 {ECO:0000313|EMBL:GAQ81611.1,
RC ECO:0000313|Proteomes:UP000054558};
RX PubMed=24865297; DOI=10.1038/ncomms4978;
RA Hori K., Maruyama F., Fujisawa T., Togashi T., Yamamoto N., Seo M.,
RA Sato S., Yamada T., Mori H., Tajima N., Moriyama T., Ikeuchi M.,
RA Watanabe M., Wada H., Kobayashi K., Saito M., Masuda T.,
RA Sasaki-Sekimoto Y., Mashiguchi K., Awai K., Shimojima M., Masuda S.,
RA Iwai M., Nobusawa T., Narise T., Kondo S., Saito H., Sato R., Murakawa M.,
RA Ihara Y., Oshima-Yamada Y., Ohtaka K., Satoh M., Sonobe K., Ishii M.,
RA Ohtani R., Kanamori-Sato M., Honoki R., Miyazaki D., Mochizuki H.,
RA Umetsu J., Higashi K., Shibata D., Kamiya Y., Sato N., Nakamura Y.,
RA Tabata S., Ida S., Kurokawa K., Ohta H.;
RT "Klebsormidium flaccidum genome reveals primary factors for plant
RT terrestrial adaptation.";
RL Nat. Commun. 5:3978-3978(2014).
CC -!- FUNCTION: Succinyl-CoA synthetase functions in the citric acid cycle
CC (TCA), coupling the hydrolysis of succinyl-CoA to the synthesis of ATP
CC and thus represents the only step of substrate-level phosphorylation in
CC the TCA. The alpha subunit of the enzyme binds the substrates coenzyme
CC A and phosphate, while succinate binding and nucleotide specificity is
CC provided by the beta subunit. {ECO:0000256|HAMAP-Rule:MF_03222}.
CC -!- CATALYTIC ACTIVITY:
CC Reaction=ATP + CoA + succinate = ADP + phosphate + succinyl-CoA;
CC Xref=Rhea:RHEA:17661, ChEBI:CHEBI:30031, ChEBI:CHEBI:30616,
CC ChEBI:CHEBI:43474, ChEBI:CHEBI:57287, ChEBI:CHEBI:57292,
CC ChEBI:CHEBI:456216; EC=6.2.1.5; Evidence={ECO:0000256|HAMAP-
CC Rule:MF_03222};
CC -!- PATHWAY: Carbohydrate metabolism; tricarboxylic acid cycle; succinate
CC from succinyl-CoA (ligase route): step 1/1. {ECO:0000256|HAMAP-
CC Rule:MF_03222}.
CC -!- SUBUNIT: Heterodimer of an alpha and a beta subunit.
CC {ECO:0000256|HAMAP-Rule:MF_03222}.
CC -!- SUBCELLULAR LOCATION: Mitochondrion {ECO:0000256|HAMAP-Rule:MF_03222}.
CC -!- SIMILARITY: Belongs to the succinate/malate CoA ligase alpha subunit
CC family. {ECO:0000256|HAMAP-Rule:MF_03222,
CC ECO:0000256|RuleBase:RU000677}.
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DR EMBL; DF237034; GAQ81611.1; -; Genomic_DNA.
DR AlphaFoldDB; A0A1Y1HXB9; -.
DR STRING; 105231.A0A1Y1HXB9; -.
DR OrthoDB; 474at2759; -.
DR UniPathway; UPA00223; UER00999.
DR Proteomes; UP000054558; Unassembled WGS sequence.
DR GO; GO:0005739; C:mitochondrion; IBA:GO_Central.
DR GO; GO:0009361; C:succinate-CoA ligase complex (ADP-forming); IBA:GO_Central.
DR GO; GO:0000166; F:nucleotide binding; IEA:UniProtKB-KW.
DR GO; GO:0004775; F:succinate-CoA ligase (ADP-forming) activity; IBA:GO_Central.
DR GO; GO:0004776; F:succinate-CoA ligase (GDP-forming) activity; IBA:GO_Central.
DR GO; GO:0006099; P:tricarboxylic acid cycle; IBA:GO_Central.
DR Gene3D; 3.40.50.720; NAD(P)-binding Rossmann-like Domain; 1.
DR Gene3D; 3.40.50.261; Succinyl-CoA synthetase domains; 1.
DR HAMAP; MF_01988; Succ_CoA_alpha; 1.
DR InterPro; IPR017440; Cit_synth/succinyl-CoA_lig_AS.
DR InterPro; IPR033847; Citrt_syn/SCS-alpha_CS.
DR InterPro; IPR003781; CoA-bd.
DR InterPro; IPR005810; CoA_lig_alpha.
DR InterPro; IPR036291; NAD(P)-bd_dom_sf.
DR InterPro; IPR005811; SUCC_ACL_C.
DR InterPro; IPR016102; Succinyl-CoA_synth-like.
DR NCBIfam; TIGR01019; sucCoAalpha; 1.
DR PANTHER; PTHR11117:SF2; SUCCINATE--COA LIGASE [ADP_GDP-FORMING] SUBUNIT ALPHA, MITOCHONDRIAL; 1.
DR PANTHER; PTHR11117; SUCCINYL-COA LIGASE SUBUNIT ALPHA; 1.
DR Pfam; PF02629; CoA_binding; 1.
DR Pfam; PF00549; Ligase_CoA; 1.
DR PIRSF; PIRSF001553; SucCS_alpha; 1.
DR PRINTS; PR01798; SCOASYNTHASE.
DR SMART; SM00881; CoA_binding; 1.
DR SUPFAM; SSF51735; NAD(P)-binding Rossmann-fold domains; 1.
DR SUPFAM; SSF52210; Succinyl-CoA synthetase domains; 1.
DR PROSITE; PS01216; SUCCINYL_COA_LIG_1; 1.
DR PROSITE; PS00399; SUCCINYL_COA_LIG_2; 1.
PE 3: Inferred from homology;
KW Ligase {ECO:0000256|HAMAP-Rule:MF_03222, ECO:0000256|RuleBase:RU000677};
KW Mitochondrion {ECO:0000256|HAMAP-Rule:MF_03222};
KW Nucleotide-binding {ECO:0000256|ARBA:ARBA00022741, ECO:0000256|HAMAP-
KW Rule:MF_03222}; Reference proteome {ECO:0000313|Proteomes:UP000054558};
KW Tricarboxylic acid cycle {ECO:0000256|ARBA:ARBA00022532, ECO:0000256|HAMAP-
KW Rule:MF_03222}.
FT DOMAIN 34..130
FT /note="CoA-binding"
FT /evidence="ECO:0000259|SMART:SM00881"
FT ACT_SITE 279
FT /note="Tele-phosphohistidine intermediate"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_03222,
FT ECO:0000256|PIRSR:PIRSR001553-1"
FT BINDING 47..50
FT /ligand="CoA"
FT /ligand_id="ChEBI:CHEBI:57287"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_03222"
FT BINDING 73
FT /ligand="CoA"
FT /ligand_id="ChEBI:CHEBI:57287"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_03222"
FT BINDING 126..128
FT /ligand="CoA"
FT /ligand_id="ChEBI:CHEBI:57287"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_03222"
FT BINDING 190
FT /ligand="substrate"
FT /ligand_note="ligand shared with subunit beta"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_03222"
SQ SEQUENCE 328 AA; 34335 MW; 2A9FAD618C8701E7 CRC64;
MFGSRGLAGL IKHAVRGIEA SRTYASSTGK PAVFVDKSTR VICQGITGKN GTFHTEQAID
YGTKMVGGVN PKKGGTEHLG LPIFKSVQEA KAETQCDASV IYVPPPFAAA AIMEAIEAEL
DLVVCITEGI PQHDMVRVKA ALLKQNKTRL IGPNCPGIIK PGECKIGIMP GYIHKPGRVG
IVSRSGTLTY EAVFQTTQVG LGQSTCVGIG GDPFNGTNFV DCLEKFVKDP QTEGIILIGE
IGGQAEEDAA DFIKESGTTK PIVSFIAGLT APPGRRMGHA GAIIAGGKGT ATDKIKALES
AGVTVSRSPA KLGTTMLQLF KDRGLLNE
//
