ID AT2A2_CHICK Reviewed; 1041 AA.
AC Q03669;
DT 01-DEC-2000, integrated into UniProtKB/Swiss-Prot.
DT 01-DEC-2000, sequence version 2.
DT 27-MAR-2024, entry version 187.
DE RecName: Full=Sarcoplasmic/endoplasmic reticulum calcium ATPase 2;
DE Short=SERCA2;
DE Short=SR Ca(2+)-ATPase 2;
DE EC=7.2.2.10;
DE AltName: Full=Calcium pump 2;
DE AltName: Full=Calcium-transporting ATPase sarcoplasmic reticulum type, slow twitch skeletal muscle isoform;
DE AltName: Full=Endoplasmic reticulum class 1/2 Ca(2+) ATPase;
GN Name=ATP2A2;
OS Gallus gallus (Chicken).
OC Eukaryota; Metazoa; Chordata; Craniata; Vertebrata; Euteleostomi;
OC Archelosauria; Archosauria; Dinosauria; Saurischia; Theropoda;
OC Coelurosauria; Aves; Neognathae; Galloanserae; Galliformes; Phasianidae;
OC Phasianinae; Gallus.
OX NCBI_TaxID=9031;
RN [1]
RP NUCLEOTIDE SEQUENCE [MRNA] (ISOFORMS 1 AND 2).
RC STRAIN=White leghorn;
RX PubMed=1831452; DOI=10.1016/s0021-9258(18)98514-5;
RA Campbell A.M., Kessler P.D., Sagara Y., Inesi G., Fambrough D.M.;
RT "Nucleotide sequences of avian cardiac and brain SR/ER Ca(2+)-ATPases and
RT functional comparisons with fast twitch Ca(2+)-ATPase. Calcium affinities
RT and inhibitor effects.";
RL J. Biol. Chem. 266:16050-16055(1991).
CC -!- FUNCTION: This magnesium-dependent enzyme catalyzes the hydrolysis of
CC ATP coupled with the translocation of calcium from the cytosol to the
CC sarcoplasmic reticulum lumen. Isoform SERCA2A is involved in the
CC regulation of the contraction/relaxation cycle. May act as a regulator
CC of TNFSF11-mediated Ca(2+) signaling during osteoclastogenesis.
CC {ECO:0000250|UniProtKB:O55143}.
CC -!- CATALYTIC ACTIVITY:
CC Reaction=ATP + Ca(2+)(in) + H2O = ADP + Ca(2+)(out) + H(+) + phosphate;
CC Xref=Rhea:RHEA:18105, ChEBI:CHEBI:15377, ChEBI:CHEBI:15378,
CC ChEBI:CHEBI:29108, ChEBI:CHEBI:30616, ChEBI:CHEBI:43474,
CC ChEBI:CHEBI:456216; EC=7.2.2.10;
CC -!- COFACTOR:
CC Name=Mg(2+); Xref=ChEBI:CHEBI:18420;
CC Evidence={ECO:0000250|UniProtKB:P11607};
CC -!- ACTIVITY REGULATION: Reversibly inhibited by phospholamban (PLN) at low
CC calcium concentrations (By similarity). Inhibited by sarcolipin (SLN)
CC and myoregulin (MRLN) (By similarity). Enhanced by DWORF; DWORF
CC increases activity by displacing sarcolipin (SLN), phospholamban (PLN)
CC and myoregulin (MRLN) (By similarity). {ECO:0000250|UniProtKB:O55143,
CC ECO:0000250|UniProtKB:P04191, ECO:0000250|UniProtKB:Q8R429}.
CC -!- SUBUNIT: Interacts with sarcolipin (SLN) (By similarity). Interacts
CC with phospholamban (PLN) (By similarity). Interacts with myoregulin
CC (MRLN). Interacts with DWORF (By similarity). Interacts with TMX2.
CC {ECO:0000250|UniProtKB:O55143, ECO:0000250|UniProtKB:P04191,
CC ECO:0000250|UniProtKB:P16615, ECO:0000250|UniProtKB:Q8R429}.
CC -!- SUBCELLULAR LOCATION: Endoplasmic reticulum membrane
CC {ECO:0000250|UniProtKB:O55143}; Multi-pass membrane protein
CC {ECO:0000255}. Sarcoplasmic reticulum membrane
CC {ECO:0000250|UniProtKB:O55143}; Multi-pass membrane protein
CC {ECO:0000255}.
CC -!- ALTERNATIVE PRODUCTS:
CC Event=Alternative splicing; Named isoforms=2;
CC Name=1; Synonyms=ATP2A2B, SERCA2B;
CC IsoId=Q03669-1; Sequence=Displayed;
CC Name=2; Synonyms=ATP2A2A, SERCA2a;
CC IsoId=Q03669-2; Sequence=VSP_000363;
CC -!- TISSUE SPECIFICITY: Only isoform 2 is detected in heart, while both
CC isoforms are expressed in brain, with isoform 2 being predominant.
CC -!- DOMAIN: Ca(2+) and ATP binding cause major rearrangements of the
CC cytoplasmic and transmembrane domains. According to the E1-E2 model,
CC Ca(2+) binding to the cytosolic domain of the pump in the high-affinity
CC E1 conformation is followed by the ATP-dependent phosphorylation of the
CC active site Asp, giving rise to E1P. A conformational change of the
CC phosphoenzyme gives rise to the low-affinity E2P state that exposes the
CC Ca(2+) ions to the lumenal side and promotes Ca(2+) release.
CC Dephosphorylation of the active site Asp mediates the subsequent return
CC to the E1 conformation. {ECO:0000250|UniProtKB:P04191}.
CC -!- DOMAIN: PLN and SLN both have a single transmembrane helix; both occupy
CC a similar binding site that is situated between the ATP2A2
CC transmembrane helices. {ECO:0000250|UniProtKB:P04191}.
CC -!- SIMILARITY: Belongs to the cation transport ATPase (P-type) (TC 3.A.3)
CC family. Type IIA subfamily. {ECO:0000305}.
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DR EMBL; M66385; AAA49066.1; -; mRNA.
DR PIR; A40812; A40812.
DR RefSeq; NP_001258902.1; NM_001271973.1. [Q03669-2]
DR RefSeq; NP_001258903.1; NM_001271974.1.
DR AlphaFoldDB; Q03669; -.
DR SMR; Q03669; -.
DR STRING; 9031.ENSGALP00000059190; -.
DR PaxDb; 9031-ENSGALP00000038523; -.
DR GeneID; 396446; -.
DR KEGG; gga:396446; -.
DR CTD; 488; -.
DR VEuPathDB; HostDB:geneid_396446; -.
DR eggNOG; KOG0202; Eukaryota.
DR HOGENOM; CLU_002360_3_2_1; -.
DR InParanoid; Q03669; -.
DR OMA; PLWNNMM; -.
DR OrthoDB; 203629at2759; -.
DR PhylomeDB; Q03669; -.
DR TreeFam; TF300651; -.
DR PRO; PR:Q03669; -.
DR Proteomes; UP000000539; Unassembled WGS sequence.
DR GO; GO:0033017; C:sarcoplasmic reticulum membrane; IEA:UniProtKB-SubCell.
DR GO; GO:0005524; F:ATP binding; IEA:UniProtKB-KW.
DR GO; GO:0016887; F:ATP hydrolysis activity; IEA:InterPro.
DR GO; GO:0046872; F:metal ion binding; IEA:UniProtKB-KW.
DR GO; GO:0005388; F:P-type calcium transporter activity; IBA:GO_Central.
DR GO; GO:0086039; F:P-type calcium transporter activity involved in regulation of cardiac muscle cell membrane potential; ISS:UniProtKB.
DR GO; GO:0000045; P:autophagosome assembly; ISS:UniProtKB.
DR GO; GO:0070588; P:calcium ion transmembrane transport; ISS:UniProtKB.
DR GO; GO:0006816; P:calcium ion transport; ISS:AgBase.
DR GO; GO:0006874; P:intracellular calcium ion homeostasis; IBA:GO_Central.
DR GO; GO:0009410; P:response to xenobiotic stimulus; IMP:AgBase.
DR CDD; cd02083; P-type_ATPase_SERCA; 1.
DR Gene3D; 3.40.1110.10; Calcium-transporting ATPase, cytoplasmic domain N; 1.
DR Gene3D; 2.70.150.10; Calcium-transporting ATPase, cytoplasmic transduction domain A; 1.
DR Gene3D; 1.20.1110.10; Calcium-transporting ATPase, transmembrane domain; 1.
DR Gene3D; 3.40.50.1000; HAD superfamily/HAD-like; 1.
DR InterPro; IPR006068; ATPase_P-typ_cation-transptr_C.
DR InterPro; IPR004014; ATPase_P-typ_cation-transptr_N.
DR InterPro; IPR023299; ATPase_P-typ_cyto_dom_N.
DR InterPro; IPR018303; ATPase_P-typ_P_site.
DR InterPro; IPR023298; ATPase_P-typ_TM_dom_sf.
DR InterPro; IPR008250; ATPase_P-typ_transduc_dom_A_sf.
DR InterPro; IPR036412; HAD-like_sf.
DR InterPro; IPR023214; HAD_sf.
DR InterPro; IPR005782; P-type_ATPase_IIA.
DR InterPro; IPR001757; P_typ_ATPase.
DR InterPro; IPR044492; P_typ_ATPase_HD_dom.
DR NCBIfam; TIGR01116; ATPase-IIA1_Ca; 1.
DR NCBIfam; TIGR01494; ATPase_P-type; 2.
DR PANTHER; PTHR42861; CALCIUM-TRANSPORTING ATPASE; 1.
DR PANTHER; PTHR42861:SF18; SARCOPLASMIC_ENDOPLASMIC RETICULUM CALCIUM ATPASE 2; 1.
DR Pfam; PF13246; Cation_ATPase; 1.
DR Pfam; PF00689; Cation_ATPase_C; 1.
DR Pfam; PF00690; Cation_ATPase_N; 1.
DR Pfam; PF00122; E1-E2_ATPase; 1.
DR Pfam; PF00702; Hydrolase; 1.
DR PRINTS; PR00119; CATATPASE.
DR PRINTS; PR00120; HATPASE.
DR SFLD; SFLDG00002; C1.7:_P-type_atpase_like; 1.
DR SFLD; SFLDF00027; p-type_atpase; 1.
DR SMART; SM00831; Cation_ATPase_N; 1.
DR SUPFAM; SSF81653; Calcium ATPase, transduction domain A; 1.
DR SUPFAM; SSF81665; Calcium ATPase, transmembrane domain M; 1.
DR SUPFAM; SSF56784; HAD-like; 1.
DR SUPFAM; SSF81660; Metal cation-transporting ATPase, ATP-binding domain N; 1.
DR PROSITE; PS00154; ATPASE_E1_E2; 1.
PE 2: Evidence at transcript level;
KW Alternative splicing; ATP-binding; Calcium; Calcium transport;
KW Disulfide bond; Endoplasmic reticulum; Ion transport; Magnesium; Membrane;
KW Metal-binding; Nucleotide-binding; Phosphoprotein; Reference proteome;
KW Sarcoplasmic reticulum; Translocase; Transmembrane; Transmembrane helix;
KW Transport.
FT CHAIN 1..1041
FT /note="Sarcoplasmic/endoplasmic reticulum calcium ATPase 2"
FT /id="PRO_0000046201"
FT TOPO_DOM 1..48
FT /note="Cytoplasmic"
FT /evidence="ECO:0000305"
FT TRANSMEM 49..69
FT /note="Helical; Name=1"
FT /evidence="ECO:0000250|UniProtKB:P04191"
FT TOPO_DOM 70..89
FT /note="Lumenal"
FT /evidence="ECO:0000305"
FT TRANSMEM 90..110
FT /note="Helical; Name=2"
FT /evidence="ECO:0000250|UniProtKB:P04191"
FT TOPO_DOM 111..253
FT /note="Cytoplasmic"
FT /evidence="ECO:0000305"
FT TRANSMEM 254..273
FT /note="Helical; Name=3"
FT /evidence="ECO:0000250|UniProtKB:P04191"
FT TOPO_DOM 274..295
FT /note="Lumenal"
FT /evidence="ECO:0000305"
FT TRANSMEM 296..313
FT /note="Helical; Name=4"
FT /evidence="ECO:0000250|UniProtKB:P04191"
FT TOPO_DOM 314..756
FT /note="Cytoplasmic"
FT /evidence="ECO:0000305"
FT TRANSMEM 757..776
FT /note="Helical; Name=5"
FT /evidence="ECO:0000250|UniProtKB:P04191"
FT TOPO_DOM 777..786
FT /note="Lumenal"
FT /evidence="ECO:0000305"
FT TRANSMEM 787..807
FT /note="Helical; Name=6"
FT /evidence="ECO:0000250|UniProtKB:P04191"
FT TOPO_DOM 808..827
FT /note="Cytoplasmic"
FT /evidence="ECO:0000305"
FT TRANSMEM 828..850
FT /note="Helical; Name=7"
FT /evidence="ECO:0000250|UniProtKB:P04191"
FT TOPO_DOM 851..896
FT /note="Lumenal"
FT /evidence="ECO:0000305"
FT TRANSMEM 897..916
FT /note="Helical; Name=8"
FT /evidence="ECO:0000250|UniProtKB:P04191"
FT TOPO_DOM 917..929
FT /note="Cytoplasmic"
FT /evidence="ECO:0000305"
FT TRANSMEM 930..948
FT /note="Helical; Name=9"
FT /evidence="ECO:0000250|UniProtKB:P04191"
FT TOPO_DOM 949..963
FT /note="Lumenal"
FT /evidence="ECO:0000305"
FT TRANSMEM 964..984
FT /note="Helical; Name=10"
FT /evidence="ECO:0000250|UniProtKB:P04191"
FT TOPO_DOM 985..1041
FT /note="Cytoplasmic"
FT /evidence="ECO:0000305"
FT REGION 787..807
FT /note="Interaction with PLN"
FT /evidence="ECO:0000250|UniProtKB:P04191"
FT REGION 931..942
FT /note="Interaction with PLN"
FT /evidence="ECO:0000250|UniProtKB:P04191"
FT ACT_SITE 351
FT /note="4-aspartylphosphate intermediate"
FT /evidence="ECO:0000250|UniProtKB:P04191"
FT BINDING 304
FT /ligand="Ca(2+)"
FT /ligand_id="ChEBI:CHEBI:29108"
FT /ligand_label="1"
FT /evidence="ECO:0000250|UniProtKB:P11607"
FT BINDING 305
FT /ligand="Ca(2+)"
FT /ligand_id="ChEBI:CHEBI:29108"
FT /ligand_label="1"
FT /evidence="ECO:0000250|UniProtKB:P11607"
FT BINDING 307
FT /ligand="Ca(2+)"
FT /ligand_id="ChEBI:CHEBI:29108"
FT /ligand_label="1"
FT /evidence="ECO:0000250|UniProtKB:P11607"
FT BINDING 309
FT /ligand="Ca(2+)"
FT /ligand_id="ChEBI:CHEBI:29108"
FT /ligand_label="1"
FT /evidence="ECO:0000250|UniProtKB:P11607"
FT BINDING 351
FT /ligand="Mg(2+)"
FT /ligand_id="ChEBI:CHEBI:18420"
FT /evidence="ECO:0000250|UniProtKB:P11607"
FT BINDING 353
FT /ligand="ATP"
FT /ligand_id="ChEBI:CHEBI:30616"
FT /evidence="ECO:0000250|UniProtKB:P11607"
FT BINDING 353
FT /ligand="Mg(2+)"
FT /ligand_id="ChEBI:CHEBI:18420"
FT /evidence="ECO:0000250|UniProtKB:P11607"
FT BINDING 442
FT /ligand="ATP"
FT /ligand_id="ChEBI:CHEBI:30616"
FT /evidence="ECO:0000250|UniProtKB:P11607"
FT BINDING 489
FT /ligand="ATP"
FT /ligand_id="ChEBI:CHEBI:30616"
FT /evidence="ECO:0000250|UniProtKB:P11607"
FT BINDING 514
FT /ligand="ATP"
FT /ligand_id="ChEBI:CHEBI:30616"
FT /evidence="ECO:0000250|UniProtKB:P11607"
FT BINDING 559
FT /ligand="ATP"
FT /ligand_id="ChEBI:CHEBI:30616"
FT /evidence="ECO:0000250|UniProtKB:P04191"
FT BINDING 624
FT /ligand="ATP"
FT /ligand_id="ChEBI:CHEBI:30616"
FT /evidence="ECO:0000250|UniProtKB:P04191"
FT BINDING 625
FT /ligand="ATP"
FT /ligand_id="ChEBI:CHEBI:30616"
FT /evidence="ECO:0000250|UniProtKB:P04191"
FT BINDING 626
FT /ligand="ATP"
FT /ligand_id="ChEBI:CHEBI:30616"
FT /evidence="ECO:0000250|UniProtKB:P11607"
FT BINDING 677
FT /ligand="ATP"
FT /ligand_id="ChEBI:CHEBI:30616"
FT /evidence="ECO:0000250|UniProtKB:P11607"
FT BINDING 683
FT /ligand="ATP"
FT /ligand_id="ChEBI:CHEBI:30616"
FT /evidence="ECO:0000250|UniProtKB:P04191"
FT BINDING 702
FT /ligand="Mg(2+)"
FT /ligand_id="ChEBI:CHEBI:18420"
FT /evidence="ECO:0000250|UniProtKB:P11607"
FT BINDING 705
FT /ligand="ATP"
FT /ligand_id="ChEBI:CHEBI:30616"
FT /evidence="ECO:0000250|UniProtKB:P11607"
FT BINDING 767
FT /ligand="Ca(2+)"
FT /ligand_id="ChEBI:CHEBI:29108"
FT /ligand_label="2"
FT /evidence="ECO:0000250|UniProtKB:P11607"
FT BINDING 770
FT /ligand="Ca(2+)"
FT /ligand_id="ChEBI:CHEBI:29108"
FT /ligand_label="2"
FT /evidence="ECO:0000250|UniProtKB:P11607"
FT BINDING 795
FT /ligand="Ca(2+)"
FT /ligand_id="ChEBI:CHEBI:29108"
FT /ligand_label="1"
FT /evidence="ECO:0000250|UniProtKB:P11607"
FT BINDING 798
FT /ligand="Ca(2+)"
FT /ligand_id="ChEBI:CHEBI:29108"
FT /ligand_label="2"
FT /evidence="ECO:0000250|UniProtKB:P11607"
FT BINDING 799
FT /ligand="Ca(2+)"
FT /ligand_id="ChEBI:CHEBI:29108"
FT /ligand_label="1"
FT /evidence="ECO:0000250|UniProtKB:P11607"
FT BINDING 799
FT /ligand="Ca(2+)"
FT /ligand_id="ChEBI:CHEBI:29108"
FT /ligand_label="2"
FT /evidence="ECO:0000250|UniProtKB:P11607"
FT BINDING 907
FT /ligand="Ca(2+)"
FT /ligand_id="ChEBI:CHEBI:29108"
FT /ligand_label="2"
FT /evidence="ECO:0000250|UniProtKB:P04191"
FT DISULFID 875..887
FT /evidence="ECO:0000250|UniProtKB:P11607"
FT VAR_SEQ 994..1041
FT /note="GKDSVQPATKPCSLSACTEGVSWPFVFITLPLVIWLYSTDTNFSDMFW ->
FT AILE (in isoform 2)"
FT /evidence="ECO:0000303|PubMed:1831452"
FT /id="VSP_000363"
SQ SEQUENCE 1041 AA; 114692 MW; 3D82DC98ECF3F53E CRC64;
MENAHTKTVE EVLAYFGVNE STGLSLEQVK KLKEKWGSNE LPAEEGKTLL ELVIEQFEDL
LVRILLLAAC ISFVLAWFEE GEETITAFVE PFVILLILVA NAIVGVWQER NAENAIEALK
EYEPEMGKVY RQDRKSVQRI KARDIVPGDI VEVAVGDKVP ADIRITSIKS TTLRVDQSIL
TGESVSVIKH TDPVPDPRAV NQDKKNMLFS GTNIAAGKAM GVVIATGVNT EIGKIRDEMV
ATEQERTPLQ QKLDEFGEQL SKVISLICIA VWIINIGHFN DPVHGGSWIR GAIYYFKIAV
ALAVAAIPEG LPAVITTCLA LGTRRMAKKN AIVRSLPSVE TLGCTSVICS DKTGTLTTNQ
MSVCRMFILD KVEGDSCSLN EFTVTGSTYA PMGEVHKDDK LIKCSQYDGL VELATICALC
NDSSLDYNEA KGVYEKVGEA TETALTCLVE KMNVFDTDLK GLSRIERANA CNSVIKQLMK
KEFTLEFSRD RKSMSVYCTP NKPSRTSMSK MFVKGAPEGV IDRCTHVRVG NAKIPLSSGI
KQKIMSVIRE WGTGRDTLRC LALATHDNPP RKEEMNLEDS SNFINYETNL TFVGCVGMLD
PPRIEVASSI KLCKQAGIRV IMITGDNKGT AVAICRRIGI FVEDEDVSTK AFTGREFDEL
SLAAQRDACH HARCFARVEP SHKSKIVEFL QSFDEITAMT GDGVNDAPAL KKAEIGIAMG
SGTAVAKTAS EMVLADDNFS TIVAAVEEGR AIYNNMKQFI RYLISSNVGE VVCIFLTAAL
GFPEALIPVQ LLWVNLVTDG LPATALGFNP PDLDIMNKPP RNPKEPLISG WLFFRYLAIG
CYVGAATVGA AAWWFIAADG GPRVTFYQLS HFLQCKEDNP DFSGVDCVVF ESPYPMTMAL
SVLVTIEMCN ALNSLSENQS LMRMPPWENI WLVGAICLSM SLHFLILYVE PLPIIFQITP
LNVTQWLMVL KISLPVILLD ETLKYVARNY LEPGKDSVQP ATKPCSLSAC TEGVSWPFVF
ITLPLVIWLY STDTNFSDMF W
//
