ID   VATA2_EQUAR             Reviewed;          30 AA.
AC   Q04238;
DT   01-OCT-1996, integrated into UniProtKB/Swiss-Prot.
DT   01-OCT-1996, sequence version 1.
DT   25-MAY-2022, entry version 64.
DE   RecName: Full=V-type proton ATPase catalytic subunit A isoform 2;
DE            Short=V-ATPase subunit A 2;
DE   AltName: Full=Vacuolar proton pump subunit alpha 2;
DE            EC=7.1.2.2;
DE   Flags: Fragment;
OS   Equisetum arvense (Field horsetail) (Common horsetail).
OC   Eukaryota; Viridiplantae; Streptophyta; Embryophyta; Tracheophyta;
OC   Polypodiopsida; Equisetidae; Equisetales; Equisetaceae; Equisetum.
OX   NCBI_TaxID=3258;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [GENOMIC DNA].
RX   PubMed=8422915; DOI=10.1016/0014-5793(93)81174-x;
RA   Starke T., Gogarten J.P.;
RT   "A conserved intron in the V-ATPase A subunit genes of plants and algae.";
RL   FEBS Lett. 315:252-258(1993).
CC   -!- FUNCTION: Catalytic subunit of the peripheral V1 complex of vacuolar
CC       ATPase. V-ATPase vacuolar ATPase is responsible for acidifying a
CC       variety of intracellular compartments in eukaryotic cells.
CC   -!- CATALYTIC ACTIVITY:
CC       Reaction=ATP + 4 H(+)(in) + H2O = ADP + 5 H(+)(out) + phosphate;
CC         Xref=Rhea:RHEA:57720, ChEBI:CHEBI:15377, ChEBI:CHEBI:15378,
CC         ChEBI:CHEBI:30616, ChEBI:CHEBI:43474, ChEBI:CHEBI:456216; EC=7.1.2.2;
CC         Evidence={ECO:0000255|PROSITE-ProRule:PRU10106};
CC   -!- SUBUNIT: V-ATPase is a heteromultimeric enzyme composed of a peripheral
CC       catalytic V1 complex (main components: subunits A, B, C, D, E, and F)
CC       attached to an integral membrane V0 proton pore complex (main
CC       component: the proteolipid protein).
CC   -!- MISCELLANEOUS: Two separate genes encode the catalytic 70 kDa V-ATPase
CC       subunit in psilotum and equisetum.
CC   -!- SIMILARITY: Belongs to the ATPase alpha/beta chains family.
CC       {ECO:0000305}.
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DR   EMBL; X56984; CAA40302.1; -; Genomic_DNA.
DR   PIR; S21815; S21815.
DR   AlphaFoldDB; Q04238; -.
DR   GO; GO:0005524; F:ATP binding; IEA:UniProtKB-KW.
DR   GO; GO:0046933; F:proton-transporting ATP synthase activity, rotational mechanism; IEA:UniProtKB-EC.
DR   GO; GO:0046961; F:proton-transporting ATPase activity, rotational mechanism; IEA:UniProtKB-EC.
PE   3: Inferred from homology;
KW   ATP-binding; Hydrogen ion transport; Ion transport; Nucleotide-binding;
KW   Translocase; Transport.
FT   CHAIN           <1..>30
FT                   /note="V-type proton ATPase catalytic subunit A isoform 2"
FT                   /id="PRO_0000144585"
FT   NON_TER         1
FT   NON_TER         30
SQ   SEQUENCE   30 AA;  3372 MW;  51CCA4A3DA9E5D84 CRC64;
     AEVPMPLRQL TMTLPDGREE SVMERTTLVA