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Reviewed, UniProtKB/Swiss-Prot O15020 (SPTN2_HUMAN)

Last modified November 3, 2009. Version 92. Feed History...

Clusters with 100%, 90%, 50% identity | Documents (6) | Third-party data | Customize display text xml rdf/xml gff fasta
Names and origin · Protein attributes · General annotation (Comments) · Ontologies · Alternative products · Sequence annotation (Features) · Sequences · References · Web resources · Cross-references · Entry information · Relevant documents

Names and origin

Protein namesRecommended name:
    Spectrin beta chain, brain 2
Alternative name(s):
    Spectrin, non-erythroid beta chain 2
    Beta-III spectrin
Gene names
Name: SPTBN2
Synonyms: KIAA0302
OrganismHomo sapiens (Human) [Complete proteome]
Taxonomic identifier9606 [NCBI]
Taxonomic lineageEukaryotaMetazoaChordataCraniataVertebrataEuteleostomiMammaliaEutheriaEuarchontogliresPrimatesHaplorrhiniCatarrhiniHominidaeHomo

Protein attributes

Sequence length2390 AA.
Sequence statusComplete.
Sequence processingThe displayed sequence is not processed.
Protein existenceEvidence at protein level.

General annotation (Comments)

Function

Probably plays an important role in neuronal membrane skeleton.

Subcellular location

Cytoplasmcytoskeleton. Cytoplasmcell cortex.

Tissue specificity

Highly expressed in brain, kidney, pancreas, and liver, and at lower levels in lung and placenta.

Involvement in disease

Defects in SPTBN2 are the cause of spinocerebellar ataxia type 5 (SCA5) [MIM:600224]. Spinocerebellar ataxia is a clinically and genetically heterogeneous group of cerebellar disorders. Patients show progressive incoordination of gait and often poor coordination of hands, speech and eye movements, due to degeneration of the cerebellum with variable involvement of the brainstem and spinal cord. SCA5 is an autosomal dominant cerebellar ataxia (ADCA). It is a slowly progressive disorder with variable age at onset, ranging between 10 and 50 years. Ref.10

Sequence similarities

Belongs to the spectrin family.

Contains 2 CH (calponin-homology) domains.

Contains 1 PH domain.

Contains 17 spectrin repeats.

Ontologies

Keywords
   Cellular componentCytoplasm
Cytoskeleton
   Coding sequence diversityAlternative splicing
Polymorphism
   DiseaseDisease mutation
Neurodegeneration
Spinocerebellar ataxia
   DomainRepeat
   LigandActin-binding
   Molecular functionActin capping
   PTMPhosphoprotein
   Technical term3D-structure
Complete proteome
Gene Ontology (GO)
   Biological processactin filament capping

Inferred from electronic annotation. Source: UniProtKB-KW

cell death

Inferred from electronic annotation. Source: UniProtKB-KW

vesicle-mediated transport Ref.2

Inferred from direct assay. Source: UniProtKB

   Cellular componentspectrin Ref.2

Inferred from direct assay. Source: UniProtKB

   Molecular functionactin binding Ref.2

Traceable author statement. Source: ProtInc

structural constituent of cytoskeleton Ref.2

Traceable author statement. Source: UniProtKB

Complete GO annotation...

Alternative products

This entry describes 2 isoforms produced by alternative splicing. [Align] [Select]
Isoform 1 (identifier: O15020-1)

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 2 (identifier: O15020-2)

The sequence of this isoform differs from the canonical sequence as follows:
     2314-2390: AEMSSWLRVV...KRFSFFKKNK → VSCPSCSSLS...RRPHQAALPV

Sequence annotation (Features)

Feature keyPosition(s)LengthDescriptionGraphical viewFeature identifier

Molecule processing

Chain1 – 23902390Spectrin beta chain, brain 2
PRO_0000073463

Regions

Domain1 – 278278Actin-binding
Domain57 – 161105CH 1
Domain176 – 278103CH 2
Repeat305 – 415111Spectrin 1
Repeat425 – 529105Spectrin 2
Repeat531 – 639109Spectrin 3
Repeat641 – 745105Spectrin 4
Repeat747 – 850104Spectrin 5
Repeat852 – 956105Spectrin 6
Repeat958 – 1063106Spectrin 7
Repeat1065 – 1170106Spectrin 8
Repeat1172 – 1276105Spectrin 9
Repeat1278 – 1381104Spectrin 10
Repeat1383 – 1486104Spectrin 11
Repeat1488 – 158699Spectrin 12
Repeat1588 – 1692105Spectrin 13
Repeat1694 – 1799106Spectrin 14
Repeat1801 – 1905105Spectrin 15
Repeat1907 – 2011105Spectrin 16
Repeat2013 – 207563Spectrin 17
Domain2218 – 2328111PH

Amino acid modifications

Modified residue21711Phosphoserine Ref.4 Ref.6
Modified residue21991Phosphoserine By similarity
Modified residue23541Phosphothreonine By similarity
Modified residue23591Phosphoserine Ref.6 Ref.5

Natural variations

Alternative sequence2314 – 239077AEMSS…FKKNK → VSCPSCSSLSVPFQKLPAAD SPSFPVLPLFPGLVLCGKTG CVRRPHQAALPV in isoform 2.
VSP_000722
Natural variant2531L → P in SCA5. Ref.10
VAR_026767
Natural variant532 – 54413Missing in SCA5.
VAR_026768
Natural variant629 – 6346LAAARR → W in SCA5.
VAR_026769
Natural variant7741E → K in a colorectal cancer sample; somatic mutation. Ref.11
VAR_035458
Natural variant8251G → S: dbSNP rs4930388.
VAR_026770
Natural variant8351E → K: dbSNP rs36054877.
VAR_048631
Natural variant10341V → A: dbSNP rs506028.
VAR_026771

Secondary structure

......................................... 2390
Helix Strand Turn

Details...

Sequences

Sequence LengthMass (Da)Tools
Isoform 1 [UniParc].

Last modified January 1, 1999. Version 2.
Checksum: E8C3033DD25A674C

FASTA2,390271,295
        10         20         30         40         50         60 
MSSTLSPTDF DSLEIQGQYS DINNRWDLPD SDWDNDSSSA RLFERSRIKA LADEREAVQK 

        70         80         90        100        110        120 
KTFTKWVNSH LARVTCRVGD LYSDLRDGRN LLRLLEVLSG EILPKPTKGR MRIHCLENVD 

       130        140        150        160        170        180 
KALQFLKEQK VHLENMGSHD IVDGNHRLTL GLVWTIILRF QIQDISVETE DNKEKKSAKD 

       190        200        210        220        230        240 
ALLLWCQMKT AGYPNVNVHN FTTSWRDGLA FNAIVHKHRP DLLDFESLKK CNAHYNLQNA 

       250        260        270        280        290        300 
FNLAEKELGL TKLLDPEDVN VDQPDEKSII TYVATYYHYF SKMKALAVEG KRIGKVLDHA 

       310        320        330        340        350        360 
MEAERLVEKY ESLASELLQW IEQTIVTLND RQLANSLSGV QNQLQSFNSY RTVEKPPKFT 

       370        380        390        400        410        420 
EKGNLEVLLF TIQSKLRANN QKVYTPREGR LISDINKAWE RLEKAEHERE LALRTELIRQ 

       430        440        450        460        470        480 
EKLEQLAARF DRKAAMRETW LSENQRLVSQ DNFGLELAAV EAAVRKHEAI ETDIVAYSGR 

       490        500        510        520        530        540 
VQAVDAVAAE LAAERYHDIK RIAARQHNVA RLWDFLRQMV AARRERLLLN LELQKVFQDL 

       550        560        570        580        590        600 
LYLMDWMEEM KGRLQSQDLG RHLAGVEDLL QLHELVEADI AVQAERVRAV SASALRFCNP 

       610        620        630        640        650        660 
GKEYRPCDPQ LVSERVAKLE QSYEALCELA AARRARLEES RRLWRFLWEV GEAEAWVREQ 

       670        680        690        700        710        720 
QHLLASADTG RDLTGALRLL NKHTALRGEM SGRLGPLKLT LEQGQQLVAE GHPGASQASA 

       730        740        750        760        770        780 
RAAELQAQWE RLEALAEERA QRLAQAASLY QFQADANDME AWLVDALRLV SSPELGHDEF 

       790        800        810        820        830        840 
STQALARQHR ALEEEIRSHR PTLDALREQA AALPPTLSRT PEVQGRVPTL ERHYEELQAR 

       850        860        870        880        890        900 
AGERARALEA ALALYTMLSE AGACGLWVEE KEQWLNGLAL PERLEDLEVV QQRFETLEPE 

       910        920        930        940        950        960 
MNTLAAQITA VNDIAEQLLK ANPPGKDRIV NTQEQLNHRW QQFRRLADGK KAALTSALSI 

       970        980        990       1000       1010       1020 
QNYHLECTET QAWMREKTKV IESTQGLGND LAGVLALQRK LAGTERDLEA IAARVGELTR 

      1030       1040       1050       1060       1070       1080 
EANALAAGHP AQAVAINARL REVQTGWEDL RATMRRREES LGEARRLQDF LRSLDDFQAW 

      1090       1100       1110       1120       1130       1140 
LGRTQTAVAS EEGPATLPEA EALLAQHAAL RGEVERAQSE YSRLRALGEE VTRDQADPQC 

      1150       1160       1170       1180       1190       1200 
LFLRQRLEAL GTGWEELGRM WESRQGRLAQ AHGFQGFLRD ARQAEGVLSS QEYVLSHTEM 

      1210       1220       1230       1240       1250       1260 
PGTLQAADAA IKKLEDFMST MDANGERIHG LLEAGRQLVS EGNIHADKIR EKADSIERRH 

      1270       1280       1290       1300       1310       1320 
KKNQDAAQQF LGRLRDNREQ QHFLQDCHEL KLWIDEKMLT AQDVSYDEAR NLHTKWQKHQ 

      1330       1340       1350       1360       1370       1380 
AFMAELAANK DWLDKVDKEG RELTLEKPEL KALVSEKLRD LHRRWDELET TTQAKARSLF 

      1390       1400       1410       1420       1430       1440 
DANRAELFAQ SCCALESWLE SLQAQLHSDD YGKDLTSVNI LLKKQQMLEW EMAVREKEVE 

      1450       1460       1470       1480       1490       1500 
AIQAQAKALA QEDQGAGEVE RTSRAVEEKF RALCQPMRER CRRLQASREQ HQFHRDVEDE 

      1510       1520       1530       1540       1550       1560 
ILWVTERLPM ASSMEHGKDL PSVQLLMKKN QTLQKEIQGH EPRIADLRER QRALGAAAAG 

      1570       1580       1590       1600       1610       1620 
PELAELQEMW KRLGHELELR GKRLEDALRA QQFYRDAAEA EAWMGEQELH MMGQEKAKDE 

      1630       1640       1650       1660       1670       1680 
LSAQAEVKKH QVLEQALADY AQTIHQLAAS SQDMIDHEHP ESTRISIRQA QVDKLYAGLK 

      1690       1700       1710       1720       1730       1740 
ELAGERRERL QEHLRLCQLR RELDDLEQWI QEREVVAASH ELGQDYEHVT MLRDKFREFS 

      1750       1760       1770       1780       1790       1800 
RDTSTIGQER VDSANALANG LIAGGHAARA TVAEWKDSLN EAWADLLELL DTRGQVLAAA 

      1810       1820       1830       1840       1850       1860 
YELQRFLHGA RQALARVQHK QQQLPDGTGR DLNAAEALQR RHCAYEHDIQ ALSPQVQQVQ 

      1870       1880       1890       1900       1910       1920 
DDGHRLQKAY AGDKAEEIGR HMQAVAEAWA QLQGSSAARR QLLLDTTDKF RFFKAVRELM 

      1930       1940       1950       1960       1970       1980 
LWMDEVNLQM DAQERPRDVS SADLVIKNQQ GIKAEIEARA DRFSSCIDMG KELLARSHYA 

      1990       2000       2010       2020       2030       2040 
AEEISEKLSQ LQARRQETAE KWQEKMDWLQ LVLEVLVFGR DAGMAEAWLC SQEPLVRSAE 

      2050       2060       2070       2080       2090       2100 
LGCTVDEVES LIKRHEAFQK SAVAWEERFC ALEKLTALEE REKERKRKRE EEERRKQPPA 

      2110       2120       2130       2140       2150       2160 
PEPTASVPPG DLVGGQTASD TTWDGTQPRP PPSTQAPSVN GVCTDGEPSQ PLLGQQRLEH 

      2170       2180       2190       2200       2210       2220 
SSFPEGPGPG SGDEANGPRG ERQTRTRGPA PSAMPQSRST ESAHAATLPP RGPEPSAQEQ 

      2230       2240       2250       2260       2270       2280 
MEGMLCRKQE MEAFGKKAAN RSWQNVYCVL RRGSLGFYKD AKAASAGVPY HGEVPVSLAR 

      2290       2300       2310       2320       2330       2340 
AQGSVAFDYR KRKHVFKLGL QDGKEYLFQA KDEAEMSSWL RVVNAAIATA SSASGEPEEP 

      2350       2360       2370       2380       2390 
VVPSTTRGMT RAMTMPPVSP VGAEGPVVLR SKDGRERERE KRFSFFKKNK 

« Hide

Isoform 2.

Checksum: F439E05A5215BB32
Show »

FASTA2,365268,279

References

« Hide 'large scale' references
[1]"Prediction of the coding sequences of unidentified human genes. VII. The complete sequences of 100 new cDNA clones from brain which can code for large proteins in vitro."
Nagase T., Ishikawa K., Nakajima D., Ohira M., Seki N., Miyajima N., Tanaka A., Kotani H., Nomura N., Ohara O.
DNA Res. 4:141-150(1997) [PubMed: 9205841] [Abstract]
Cited for: NUCLEOTIDE SEQUENCE [LARGE SCALE MRNA] (ISOFORM 1).
Tissue: Brain.
[2]"A widely expressed betaIII spectrin associated with Golgi and cytoplasmic vesicles."
Stankewich M.C., Tse W.T., Peters L.L., Ch'ng Y., John K.M., Stabach P.R., Devarajan P., Morrow J.S., Lux S.E.
Proc. Natl. Acad. Sci. U.S.A. 95:14158-14163(1998) [PubMed: 9826670] [Abstract]
Cited for: NUCLEOTIDE SEQUENCE [MRNA] OF 1-34.
Tissue: Brain.
[3]"SPTBN2, a new, widely expressed beta III spectrin gene located on human chromosome 11q13 and mouse chromosome 19."
Tse W.T., Peters L.L., John K.M., Lux S.E.
Submitted (SEP-1997) to the EMBL/GenBank/DDBJ databases
Cited for: NUCLEOTIDE SEQUENCE [MRNA] OF 1900-2390 (ISOFORMS 1 AND 2).
Tissue: Brain.
[4]"Global, in vivo, and site-specific phosphorylation dynamics in signaling networks."
Olsen J.V., Blagoev B., Gnad F., Macek B., Kumar C., Mortensen P., Mann M.
Cell 127:635-648(2006) [PubMed: 17081983] [Abstract]
Cited for: PHOSPHORYLATION [LARGE SCALE ANALYSIS] AT SER-2171, MASS SPECTROMETRY.
Tissue: Epithelium.
[5]"Kinase-selective enrichment enables quantitative phosphoproteomics of the kinome across the cell cycle."
Daub H., Olsen J.V., Bairlein M., Gnad F., Oppermann F.S., Korner R., Greff Z., Keri G., Stemmann O., Mann M.
Mol. Cell 31:438-448(2008) [PubMed: 18691976] [Abstract]
Cited for: PHOSPHORYLATION [LARGE SCALE ANALYSIS] AT SER-2359, MASS SPECTROMETRY.
[6]"A quantitative atlas of mitotic phosphorylation."
Dephoure N., Zhou C., Villen J., Beausoleil S.A., Bakalarski C.E., Elledge S.J., Gygi S.P.
Proc. Natl. Acad. Sci. U.S.A. 105:10762-10767(2008) [PubMed: 18669648] [Abstract]
Cited for: PHOSPHORYLATION [LARGE SCALE ANALYSIS] AT SER-2171 AND SER-2359, MASS SPECTROMETRY.
[7]Colinge J., Superti-Furga G., Bennett K.L.
Submitted (OCT-2008) to UniProtKB
Cited for: IDENTIFICATION [LARGE SCALE ANALYSIS], MASS SPECTROMETRY.
[8]"Solution structure of pleckstrin homology domain of human beta III spectrin."
RIKEN structural genomics initiative (RSGI)
Submitted (NOV-2004) to the PDB data bank
Cited for: STRUCTURE BY NMR OF 2219-2328.
[9]"Solution structure of the second CH domain of human spectrin beta chain, brain 2."
RIKEN structural genomics initiative (RSGI)
Submitted (AUG-2005) to the PDB data bank
Cited for: STRUCTURE BY NMR OF 178-291.
[10]"Spectrin mutations cause spinocerebellar ataxia type 5."
Ikeda Y., Dick K.A., Weatherspoon M.R., Gincel D., Armbrust K.R., Dalton J.C., Stevanin G., Duerr A., Zuehlke C., Buerk K., Clark H.B., Brice A., Rothstein J.D., Schut L.J., Day J.W., Ranum L.P.W.
Nat. Genet. 38:184-190(2006) [PubMed: 16429157] [Abstract]
Cited for: VARIANTS SCA5 PRO-253; 532-GLU--MET-544 DEL AND 629-LEU--ARG-634 DELINS TRP.
[11]"The consensus coding sequences of human breast and colorectal cancers."
Sjoeblom T., Jones S., Wood L.D., Parsons D.W., Lin J., Barber T.D., Mandelker D., Leary R.J., Ptak J., Silliman N., Szabo S., Buckhaults P., Farrell C., Meeh P., Markowitz S.D., Willis J., Dawson D., Willson J.K.V. expand/collapse author list , Gazdar A.F., Hartigan J., Wu L., Liu C., Parmigiani G., Park B.H., Bachman K.E., Papadopoulos N., Vogelstein B., Kinzler K.W., Velculescu V.E.
Science 314:268-274(2006) [PubMed: 16959974] [Abstract]
Cited for: VARIANT [LARGE SCALE ANALYSIS] LYS-774.
+Additional computationally mapped references.

Web resources

Cross-references

Sequence databases

AB008567 mRNA. Translation: BAA32700.2. Different initiation.
AF079569 mRNA. Translation: AAC80006.1.
AF026487 mRNA. Translation: AAC79502.1.
AF026488 mRNA. Translation: AAC79503.1.
AF026488 mRNA. Translation: AAC79504.1.
IPIIPI00012645.
IPI00218207.
RefSeqNP_008877.1.
UniGeneHs.26915

3D structure databases

EntryMethodResolution (Å)ChainPositionsPDBsum
1WJMNMR-A2219-2328[»]
1WYQNMR-A178-291[»]
SMRO15020. Positions 2212-2333.
ModBaseSearch...

Protein-protein interaction databases

IntActO15020. 1 interaction.
STRINGO15020.

PTM databases

PhosphoSiteO15020.

Proteomic databases

PRIDEO15020.

Genome annotation databases

EnsemblENST00000309996; ENSP00000311489; ENSG00000173898; Homo sapiens. [Genome view]
ENST00000443262; ENSP00000403047; ENSG00000173898; Homo sapiens. [Genome view]
GeneID6712.
KEGGhsa:6712.
UCSCuc001ojd.1. human.

Organism-specific databases

CTD6712.
GeneCardsGC11M066209.
H-InvDBHIX0021762.
HGNCHGNC:11276. SPTBN2.
HPACAB009844.
MIM600224. phenotype.
604985. gene.
Orphanet98766. Ataxia, spinocerebellar, type 5.
99. Autosomal dominant cerebellar ataxia.
PharmGKBPA36105.
HUGESearch...
GenAtlasSearch...

Phylogenomic databases

HOGENOMO15020.
HOVERGENO15020.

Enzyme and pathway databases

ReactomeREACT_18266. Axon guidance.

Gene expression databases

ArrayExpressO15020.
BgeeO15020.
CleanExHS_SPTBN2.
GenevestigatorO15020.
GermOnlineENSG00000173898. Homo sapiens.

Family and domain databases

InterProIPR001589. Actinin_actin-bd_CS.
IPR001715. Calponin_act_bd.
IPR011993. PH_type.
IPR001849. Pleckstrin_homology.
IPR018159. Spectrin/alpha-actinin.
IPR016343. Spectrin_bsu.
IPR001605. Spectrin_PH.
IPR002017. Spectrin_repeat.
[Graphical view]
Gene3DG3DSA:1.10.418.10. Calponin-homology. 2 hits.
G3DSA:2.30.29.30. PH_type. 1 hit.
PfamPF00307. CH. 2 hits.
PF00169. PH. 1 hit.
PF00435. Spectrin. 17 hits.
[Graphical view]
PIRSFPIRSF002297. Spectrin_beta_subunit. 1 hit.
PRINTSPR00683. SPECTRINPH.
SMARTSM00033. CH. 2 hits.
SM00233. PH. 1 hit.
SM00150. SPEC. 17 hits.
[Graphical view]
PROSITEPS00019. ACTININ_1. 1 hit.
PS00020. ACTININ_2. 1 hit.
PS50021. CH. 2 hits.
PS50003. PH_DOMAIN. 1 hit.
[Graphical view]
ProtoNetSearch...

Other Resources

NextBio26178.
SOURCESearch...

Entry information

Entry nameSPTN2_HUMAN
AccessionPrimary (citable) accession number: O15020
Secondary accession number(s): O14872, O14873
Entry history
Integrated into UniProtKB/Swiss-Prot: November 16, 2001
Last sequence update: January 1, 1999
Last modified: November 3, 2009
This is version 92 of the entry and version 2 of the sequence. [Complete history]
Entry statusReviewed (UniProtKB/Swiss-Prot)
Annotation projectHPI (Human Proteome Initiative)
DisclaimerAny medical or genetic information present in this entry is provided for research, educational and informational purposes only. It is not in any way intended to be used as a substitute for professional medical advice, diagnosis, treatment or care.

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List of human entries with polymorphisms or disease mutations

Human polymorphisms and disease mutations

Index of human polymorphisms and disease mutations

MIM cross-references

Online Mendelian Inheritance in Man (MIM) cross-references in UniProtKB/Swiss-Prot

PDB cross-references

Index of Protein Data Bank (PDB) cross-references

SIMILARITY comments

Index of protein domains and families

Names and origin · Protein attributes · General annotation (Comments) · Ontologies · Alternative products · Sequence annotation (Features) · Sequences · References · Web resources · Cross-references · Entry information · Relevant documents