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Reviewed, UniProtKB/Swiss-Prot Q01814 (AT2B2_HUMAN)

Last modified November 25, 2008. Version 91. Feed History...

Clusters with 100%, 90%, 50% identity | Documents (3) | Third-party data | Customize display text xml rdf/xml gff fasta
Names and origin · Protein attributes · General annotation (Comments) · Ontologies · Binary interactions · Alternative products · Sequence annotation (Features) · Sequences · References · Cross-references · Entry information · Relevant documents

Names and origin

Protein namesRecommended name:
    Plasma membrane calcium-transporting ATPase 2
      Short name=PMCA2
    EC=3.6.3.8
Alternative name(s):
    Plasma membrane calcium ATPase isoform 2
    Plasma membrane calcium pump isoform 2
Gene names
Name: ATP2B2
Synonyms: PMCA2
OrganismHomo sapiens (Human)
Taxonomic identifier9606 [NCBI]
Taxonomic lineageEukaryotaMetazoaChordataCraniataVertebrataEuteleostomiMammaliaEutheriaEuarchontogliresPrimatesHaplorrhiniCatarrhiniHominidaeHomo

Protein attributes

Sequence length1243 AA.
Sequence statusComplete.
Sequence processingThe displayed sequence is not processed.
Protein existenceEvidence at protein level.

General annotation (Comments)

Function

This magnesium-dependent enzyme catalyzes the hydrolysis of ATP coupled with the transport of calcium out of the cell.

Catalytic activity

ATP + H(2)O + Ca(2+)(Cis) = ADP + phosphate + Ca(2+)(Trans).

Subcellular location

Cell membrane; Multi-pass membrane protein.

Tissue specificity

Mainly expressed in brain cortex. Found in low levels in skeletal muscle, heart muscle, stomach, liver, kidney and lung. Isoforms containing segment B are found in brain cortex and at low levels in other tissues. Isoforms containing segments X and W are found at low levels in all tissues. Isoforms containing segment A and segment Z are found at low levels in skeletal muscle and heart muscle.

Sequence similarities

Belongs to the cation transport ATPase (P-type) family. Type IIB subfamily.

Binary interactions

With

Entry

#Exp.

IntAct

Notes

Dlg1Q626961EBI-1174262,EBI-389325From a different organism.
Dlg2Q636222EBI-1174262,EBI-396947From a different organism.
Dlg4P310161EBI-1174262,EBI-375655From a different organism.
SLC9A3R2Q8SQG92EBI-1174262,EBI-1174758From a different organism.

Alternative products

This entry describes 6 isoforms produced by alternative splicing. [Align] [Select]

Notes: There is a combination of two alternative spliced domains at N-terminal site A (W, X and Z) and at C-terminal site C (A and B). So far the splice sites have only been studied independently. Experimental confirmation may be lacking for some isoforms.
Isoform WB (identifier: Q01814-1)

Also known as: AIIICI;

This isoform has been chosen as the 'canonical' sequence. All positional information in this entry refers to it. This is also the sequence that appears in the downloadable versions of the entry.
Isoform WA (identifier: Q01814-2)

Also known as: AIIICII;

The sequence of this isoform differs from the canonical sequence as follows:
     1141-1243: IRVVKAFRSS...SPIHSLETSL → IEVVNTFKSG...SLPPAAAGQG
Isoform XA (identifier: Q01814-3)

Also known as: AIICII;

The sequence of this isoform differs from the canonical sequence as follows:
     334-347: Missing.
     1141-1243: IRVVKAFRSS...SPIHSLETSL → IEVVNTFKSG...SLPPAAAGQG
Isoform ZA (identifier: Q01814-4)

Also known as: AICII;

The sequence of this isoform differs from the canonical sequence as follows:
     303-347: Missing.
     1141-1243: IRVVKAFRSS...SPIHSLETSL → IEVVNTFKSG...SLPPAAAGQG
Isoform XB (identifier: Q01814-5)

Also known as: AIICI;

The sequence of this isoform differs from the canonical sequence as follows:
     334-347: Missing.
Isoform ZB (identifier: Q01814-6)

Also known as: AICI;

The sequence of this isoform differs from the canonical sequence as follows:
     303-347: Missing.

Sequence annotation (Features)

Feature keyPosition(s)LengthDescriptionGraphical viewFeature identifier

Molecule processing

Chain1 – 12431243Plasma membrane calcium-transporting ATPase 2
PRO_0000046214

Regions

Topological domain1 – 9494Cytoplasmic Potential
Transmembrane95 – 11521 Potential
Topological domain116 – 15237Extracellular Potential
Transmembrane153 – 17321 Potential
Topological domain174 – 390217Cytoplasmic Potential
Transmembrane391 – 41020 Potential
Topological domain411 – 44333Extracellular Potential
Transmembrane444 – 46118 Potential
Topological domain462 – 875414Cytoplasmic Potential
Transmembrane876 – 89520 Potential
Topological domain896 – 90510Extracellular Potential
Transmembrane906 – 92621 Potential
Topological domain927 – 94620Cytoplasmic Potential
Transmembrane947 – 96923 Potential
Topological domain970 – 98718Extracellular Potential
Transmembrane988 – 100922 Potential
Topological domain1010 – 102819Cytoplasmic Potential
Transmembrane1029 – 105022 Potential
Topological domain1051 – 106010Extracellular Potential
Transmembrane1061 – 108222 Potential
Topological domain1083 – 1243161Cytoplasmic Potential
Region1123 – 114018Calmodulin-binding subdomain A By similarity
Region1141 – 115010Calmodulin-binding subdomain B By similarity
Compositional bias294 – 2974Poly-Glu

Sites

Active site49914-aspartylphosphate intermediate
Metal binding8201Magnesium By similarity
Metal binding8241Magnesium By similarity

Amino acid modifications

Modified residue11391Phosphothreonine; by PKC By similarity
Modified residue12011Phosphoserine; by PKA By similarity
Modified residue12311Phosphoserine
Modified residue12341Phosphoserine
Modified residue12381Phosphoserine
Modified residue12411Phosphothreonine
Modified residue12421Phosphoserine

Natural variations

Alternative sequence303 – 34745Missing in isoform ZA and isoform ZB.
VSP_000384
Alternative sequence334 – 34714Missing in isoform XA and isoform XB.
VSP_000385
Alternative sequence1141 – 1243103IRVVK…LETSL → IEVVNTFKSGASFQGALRRQ SSVTSQSQDVANLSSPSRVS LSNALSSPTSLPPAAAGQG in isoform WA, isoform XA and isoform ZA.
VSP_000386

Experimental info

Sequence conflict92 – 943PKT → AKP in AAA36456. Ref.1
Sequence conflict1261P → R in AAA50877 and AAA51893. Ref.2
Sequence conflict5171G → D in AAA50877 and AAA51893. Ref.2
Sequence conflict667 – 6682DG → EW in AAA36456. Ref.1
Sequence conflict12121A → S in AAA36456. Ref.1

Sequences

Sequence LengthMass (Da)Tools
Isoform WB (AIIICI) [UniParc].

Last modified June 1, 2001. Version 2.
Checksum: 7F10221B7B9AC3A2

FASTA1,243136,876
        10         20         30         40         50         60 
MGDMTNSDFY SKNQRNESSH GGEFGCTMEE LRSLMELRGT EAVVKIKETY GDTEAICRRL 

        70         80         90        100        110        120 
KTSPVEGLPG TAPDLEKRKQ IFGQNFIPPK KPKTFLQLVW EALQDVTLII LEIAAIISLG 

       130        140        150        160        170        180 
LSFYHPPGEG NEGCATAQGG AEDEGEAEAG WIEGAAILLS VICVVLVTAF NDWSKEKQFR 

       190        200        210        220        230        240 
GLQSRIEQEQ KFTVVRAGQV VQIPVAEIVV GDIAQVKYGD LLPADGLFIQ GNDLKIDESS 

       250        260        270        280        290        300 
LTGESDQVRK SVDKDPMLLS GTHVMEGSGR MLVTAVGVNS QTGIIFTLLG AGGEEEEKKD 

       310        320        330        340        350        360 
KKGVKKGDGL QLPAADGAAA SNAADSANAS LVNGKMQDGN VDASQSKAKQ QDGAAAMEMQ 

       370        380        390        400        410        420 
PLKSAEGGDA DDRKKASMHK KEKSVLQGKL TKLAVQIGKA GLVMSAITVI ILVLYFTVDT 

       430        440        450        460        470        480 
FVVNKKPWLP ECTPVYVQYF VKFFIIGVTV LVVAVPEGLP LAVTISLAYS VKKMMKDNNL 

       490        500        510        520        530        540 
VRHLDACETM GNATAICSDK TGTLTTNRMT VVQAYVGDVH YKEIPDPSSI NTKTMELLIN 

       550        560        570        580        590        600 
AIAINSAYTT KILPPEKEGA LPRQVGNKTE CGLLGFVLDL KQDYEPVRSQ MPEEKLYKVY 

       610        620        630        640        650        660 
TFNSVRKSMS TVIKLPDESF RMYSKGASEI VLKKCCKILN GAGEPRVFRP RDRDEMVKKV 

       670        680        690        700        710        720 
IEPMACDGLR TICVAYRDFP SSPEPDWDNE NDILNELTCI CVVGIEDPVR PEVPEAIRKC 

       730        740        750        760        770        780 
QRAGITVRMV TGDNINTARA IAIKCGIIHP GEDFLCLEGK EFNRRIRNEK GEIEQERIDK 

       790        800        810        820        830        840 
IWPKLRVLAR SSPTDKHTLV KGIIDSTHTE QRQVVAVTGD GTNDGPALKK ADVGFAMGIA 

       850        860        870        880        890        900 
GTDVAKEASD IILTDDNFSS IVKAVMWGRN VYDSISKFLQ FQLTVNVVAV IVAFTGACIT 

       910        920        930        940        950        960 
QDSPLKAVQM LWVNLIMDTF ASLALATEPP TETLLLRKPY GRNKPLISRT MMKNILGHAV 

       970        980        990       1000       1010       1020 
YQLALIFTLL FVGEKMFQID SGRNAPLHSP PSEHYTIIFN TFVMMQLFNE INARKIHGER 

      1030       1040       1050       1060       1070       1080 
NVFDGIFRNP IFCTIVLGTF AIQIVIVQFG GKPFSCSPLQ LDQWMWCIFI GLGELVWGQV 

      1090       1100       1110       1120       1130       1140 
IATIPTSRLK FLKEAGRLTQ KEEIPEEELN EDVEEIDHAE RELRRGQILW FRGLNRIQTQ 

      1150       1160       1170       1180       1190       1200 
IRVVKAFRSS LYEGLEKPES RTSIHNFMAH PEFRIEDSQP HIPLIDDTDL EEDAALKQNS 

      1210       1220       1230       1240 
SPPSSLNKNN SAIDSGINLT TDTSKSATSS SPGSPIHSLE TSL 

« Hide

Isoform WA (AIIICII) [UniParc].

Checksum: 63CF042CC00776B1
Show »

1,199131,618
Isoform XA (AIICII) [UniParc].

Checksum: DED471E8D9102EF2
Show »

1,185130,171
Isoform ZA (AICII) [UniParc].

Checksum: ECB232AA4AC37BE8
Show »

1,154127,335
Isoform XB (AIICI) [UniParc].

Checksum: A7E663E42EBDEAA9
Show »

1,229135,430
Isoform ZB (AICI) [UniParc].

Checksum: EEF94C16D4C1C73E
Show »

1,198132,594

References

« Hide 'large scale' references
[1]"Determination of the nucleotide sequence and chromosomal localization of the ATP2B2 gene encoding human Ca(2+)-pumping ATPase isoform PMCA2."
Brandt P., Ibrahim E., Bruns G.A.P., Neve R.L.
Genomics 14:484-487(1992) [PubMed: 1427863] [Abstract]
Cited for: NUCLEOTIDE SEQUENCE [MRNA] (ISOFORM ZB).
Tissue: Brain.
[2]"von Hippel-Lindau syndrome: cloning and identification of the plasma membrane Ca(++)-transporting ATPase isoform 2 gene that resides in the von Hippel-Lindau gene region."
Latif F., Duh F.-M., Gnarra J., Tory K., Kuzmin I., Yao M., Stackhouse T., Modi W., Geil L., Schmidt L., Li H., Orcutt M.L., Maher E., Richards F., Phipps M., Ferguson-Smith M., le Paslier D., Linehan W.M., Zbar B., Lerman M.I.
Cancer Res. 53:861-867(1993) [PubMed: 8428366] [Abstract]
Cited for: NUCLEOTIDE SEQUENCE [MRNA] (ISOFORM ZB), ALTERNATIVE SPLICING (ISOFORM W).
[3]"Microdiversity of human-plasma-membrane calcium-pump isoform 2 generated by alternative RNA splicing in the N-terminal coding region."
Heim R., Hug M., Iwata T., Strehler E.E., Carafoli E.
Eur. J. Biochem. 205:333-340(1992) [PubMed: 1313367] [Abstract]
Cited for: PARTIAL NUCLEOTIDE SEQUENCE (ISOFORMS WB; X AND Z).
Tissue: Brain and Skeletal muscle.
[4]"Quantitative analysis of alternative splicing options of human plasma membrane calcium pump genes."
Stauffer T.P., Hilfiker H., Carafoli E., Strehler E.E.
J. Biol. Chem. 268:25993-26003(1993) [