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Reviewed, UniProtKB/Swiss-Prot Q8TCU6 (PREX1_HUMAN)

Last modified February 9, 2010. Version 84. Feed History...

Clusters with 100%, 90%, 50% identity | Documents (5) | 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:
    Phosphatidylinositol 3,4,5-trisphosphate-dependent Rac exchanger 1 protein
      Short name=PtdIns(3,4,5)-dependent Rac exchanger 1
      Short name=P-Rex1
Gene names
Name: PREX1
Synonyms: KIAA1415
OrganismHomo sapiens (Human) [Complete proteome]
Taxonomic identifier9606 [NCBI]
Taxonomic lineageEukaryotaMetazoaChordataCraniataVertebrataEuteleostomiMammaliaEutheriaEuarchontogliresPrimatesHaplorrhiniCatarrhiniHominidaeHomo

Protein attributes

Sequence length1659 AA.
Sequence statusComplete.
Protein existenceEvidence at protein level.

General annotation (Comments)

Function

Functions as a RAC guanine nucleotide exchange factor (GEF), which activates the Rac proteins by exchanging bound GDP for free GTP. Its activity is synergistically activated by phosphatidylinositol-3,4,5-triphosphate and the beta gamma subunits of heterotrimeric G protein. May function downstream of heterotrimeric G proteins in neutrophils.

Subunit structure

Interacts preferentially with RAC2 By similarity. Interacts with RAC1.

Subcellular location

Cytoplasmcytosol. Cell membrane. Note: Mainly cytosolic. Some amount is apparently associated to the plasma membrane.

Tissue specificity

Mainly expressed in peripheral blood leukocytes and brain. Expressed at intermediate level in spleen and lymph nodes, and weakly expressed in other tissues.

Sequence similarities

Contains 1 DEP domain.

Contains 1 DH (DBL-homology) domain.

Contains 1 PDZ (DHR) domain.

Contains 2 PH domains.

Binary interactions

Alternative products

This entry describes 3 isoforms produced by alternative splicing. [Align] [Select]
Isoform 1 (identifier: Q8TCU6-1)

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: Q8TCU6-2)

The sequence of this isoform differs from the canonical sequence as follows:
     1-703: Missing.
     704-708: TKAKE → MGLEQ
Isoform 3 (identifier: Q8TCU6-3)

The sequence of this isoform differs from the canonical sequence as follows:
     1471-1561: VLENVEGLPS...PKPGAAGSVG → GELQAWGRED...TCPRMPAPRR
     1562-1659: Missing.
Note: Gene prediction based on EST data. No experimental confirmation available.

Sequence annotation (Features)

Feature keyPosition(s)LengthDescriptionGraphical viewFeature identifier

Molecule processing

Chain1 – 16591659Phosphatidylinositol 3,4,5-trisphosphate-dependent Rac exchanger 1 protein
PRO_0000080965

Regions

Domain49 – 240192DH
Domain271 – 392122PH
Domain421 – 49676DEP 1
Domain523 – 59775DEP 2
Domain625 – 70379PDZ

Amino acid modifications

Modified residue4361Phosphoserine Ref.8

Natural variations

Alternative sequence1 – 703703Missing in isoform 2.
VSP_001818
Alternative sequence704 – 7085TKAKE → MGLEQ in isoform 2.
VSP_001819
Alternative sequence1471 – 156191VLENV…AGSVG → GELQAWGREDHGGRAKATKH TGSQPPARPRHLPSQCWRTW RGCLLQAARPRRICSRTSTR SPWRKFSSITANSGHFTWSG LTCPRMPAPRR in isoform 3.
VSP_015090
Alternative sequence1562 – 165998Missing in isoform 3.
VSP_015091
Natural variant6591V → M: dbSNP rs55904123. Ref.7
VAR_061798
Natural variant6961R → C: dbSNP rs7271583.
VAR_057191
Natural variant7861Q → H: dbSNP rs41283558. Ref.7
VAR_061799
Natural variant11181A → T: dbSNP rs6012504. Ref.1
VAR_057192
Natural variant12401V → I: dbSNP rs16993997. Ref.7
VAR_023210
Natural variant13401K → E: dbSNP rs2664521. Ref.7 Ref.1 Ref.4 Ref.6
VAR_023211
Natural variant15591S → T: dbSNP rs3936192.
VAR_023212

Experimental info

Sequence conflict9101A → V in CAB66514. Ref.2

Sequences

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

Last modified May 29, 2007. Version 3.
Checksum: 159419355ED0F00F

FASTA1,659186,203
        10         20         30         40         50         60 
MEAPSGSEPG GDGAGDCAHP DPRAPGAAAP SSGPGPCAAA RESERQLRLR LCVLNEILGT 

        70         80         90        100        110        120 
ERDYVGTLRF LQSAFLHRIR QNVADSVEKG LTEENVKVLF SNIEDILEVH KDFLAALEYC 

       130        140        150        160        170        180 
LHPEPQSQHE LGNVFLKFKD KFCVYEEYCS NHEKALRLLV ELNKIPTVRA FLLSCMLLGG 

       190        200        210        220        230        240 
RKTTDIPLEG YLLSPIQRIC KYPLLLKELA KRTPGKHPDH PAVQSALQAM KTVCSNINET 

       250        260        270        280        290        300 
KRQMEKLEAL EQLQSHIEGW EGSNLTDICT QLLLQGTLLK ISAGNIQERA FFLFDNLLVY 

       310        320        330        340        350        360 
CKRKSRVTGS KKSTKRTKSI NGSLYIFRGR INTEVMEVEN VEDGTADYHS NGYTVTNGWK 

       370        380        390        400        410        420 
IHNTAKNKWF VCMAKTAEEK QKWLDAIIRE REQRESLKLG MERDAYVMIA EKGEKLYHMM 

       430        440        450        460        470        480 
MNKKVNLIKD RRRKLSTVPK CFLGNEFVAW LLEIGEISKT EEGVNLGQAL LENGIIHHVS 

       490        500        510        520        530        540 
DKHQFKNEQV MYRFRYDDGT YKARSELEDI MSKGVRLYCR LHSLYTPVIK DRDYHLKTYK 

       550        560        570        580        590        600 
SVLPGSKLVD WLLAQGDCQT REEAVALGVG LCNNGFMHHV LEKSEFRDES QYFRFHADEE 

       610        620        630        640        650        660 
MEGTSSKNKQ LRNDFKLVEN ILAKRLLILP QEEDYGFDIE EKNKAVVVKS VQRGSLAEVA 

       670        680        690        700        710        720 
GLQVGRKIYS INEDLVFLRP FSEVESILNQ SFCSRRPLRL LVATKAKEII KIPDQPDTLC 

       730        740        750        760        770        780 
FQIRGAAPPY VYAVGRGSEA MAAGLCAGQC ILKVNGSNVM NDGAPEVLEH FQAFRSRREE 

       790        800        810        820        830        840 
ALGLYQWIYH THEDAQEARA SQEASTEDPS GEQAQEEDQA DSAFPLLSLG PRLSLCEDSP 

       850        860        870        880        890        900 
MVTLTVDNVH LEHGVVYEYV STAGVRCHVL EKIVEPRGCF GLTAKILEAF AANDSVFVEN 

       910        920        930        940        950        960 
CRRLMALSSA IVTMPHFEFR NICDTKLESI GQRIACYQEF AAQLKSRVSP PFKQAPLEPH 

       970        980        990       1000       1010       1020 
PLCGLDFCPT NCHINLMEVS YPKTTPSVGR SFSIRFGRKP SLIGLDPEQG HLNPMSYTQH 

      1030       1040       1050       1060       1070       1080 
CITTMAAPSW KCLPAAEGDP QGQGLHDGSF GPASGTLGQE DRGLSFLLKQ EDREIQDAYL 

      1090       1100       1110       1120       1130       1140 
QLFTKLDVAL KEMKQYVTQI NRLLSTITEP TSGGSCDASL AEEASSLPLV SEESEMDRSD 

      1150       1160       1170       1180       1190       1200 
HGGIKKVCFK VAEEDQEDSG HDTMSYRDSY SECNSNRDSV LSYTSVRSNS SYLGSDEMGS 

      1210       1220       1230       1240       1250       1260 
GDELPCDMRI PSDKQDKLHG CLEHLFNQVD SINALLKGPV MSRAFEETKH FPMNHSLQEF 

      1270       1280       1290       1300       1310       1320 
KQKEECTIRG RSLIQISIQE DPWNLPNSIK TLVDNIQRYV EDGKNQLLLA LLKCTDTELQ 

      1330       1340       1350       1360       1370       1380 
LRRDAIFCQA LVAAVCTFSK QLLAALGYRY NNNGEYEESS RDASRKWLEQ VAATGVLLHC 

      1390       1400       1410       1420       1430       1440 
QSLLSPATVK EERTMLEDIW VTLSELDNVT FSFKQLDENY VANTNVFYHI EGSRQALKVI 

      1450       1460       1470       1480       1490       1500 
FYLDSYHFSK LPSRLEGGAS LRLHTALFTK VLENVEGLPS PGSQAAEDLQ QDINAQSLEK 

      1510       1520       1530       1540       1550       1560 
VQQYYRKLRA FYLERSNLPT DASTTAVKID QLIRPINALD ELCRLMKSFV HPKPGAAGSV 

      1570       1580       1590       1600       1610       1620 
GAGLIPISSE LCYRLGACQM VMCGTGMQRS TLSVSLEQAA ILARSHGLLP KCIMQATDIM 

      1630       1640       1650 
RKQGPRVEIL AKNLRVKDQM PQGAPRLYRL CQPPVDGDL 

« Hide

Isoform 2.

Checksum: E2DCA9099F0CE2C7
Show »

FASTA956106,093
Isoform 3.

Checksum: CACDE55657E3A86D
Show »

FASTA1,561175,847

References

« Hide 'large scale' references
[1]"P-Rex1, a PtdIns(3,4,5)P3- and Gbetagamma-regulated guanine-nucleotide exchange factor for Rac."
Welch H.C.E., Coadwell W.J., Ellson C.D., Ferguson G.J., Andrews S.R., Erdjument-Bromage H., Tempst P., Hawkins P.T., Stephens L.R.
Cell 108:809-821(2002) [PubMed: 11955434] [Abstract]
Cited for: NUCLEOTIDE SEQUENCE [MRNA] (ISOFORM 1), PROTEIN SEQUENCE OF 182-198; 913-920; 1463-1470; 1501-1506 AND 1590-1604, CHARACTERIZATION, VARIANTS THR-1118 AND GLU-1340.
[2]"Towards a catalog of human genes and proteins: sequencing and analysis of 500 novel complete protein coding human cDNAs."
Wiemann S., Weil B., Wellenreuther R., Gassenhuber J., Glassl S., Ansorge W., Boecher M., Bloecker H., Bauersachs S., Blum H., Lauber J., Duesterhoeft A., Beyer A., Koehrer K., Strack N., Mewes H.-W., Ottenwaelder B., Obermaier B. expand/collapse author list , Tampe J., Heubner D., Wambutt R., Korn B., Klein M., Poustka A.
Genome Res. 11:422-435(2001) [PubMed: 11230166] [Abstract]
Cited for: NUCLEOTIDE SEQUENCE [LARGE SCALE MRNA] (ISOFORM 2).
Tissue: Amygdala.
[3]"The DNA sequence and comparative analysis of human chromosome 20."
Deloukas P., Matthews L.H., Ashurst J.L., Burton J., Gilbert J.G.R., Jones M., Stavrides G., Almeida J.P., Babbage A.K., Bagguley C.L., Bailey J., Barlow K.F., Bates K.N., Beard L.M., Beare D.M., Beasley O.P., Bird C.P., Blakey S.E. expand/collapse author list , Bridgeman A.M., Brown A.J., Buck D., Burrill W.D., Butler A.P., Carder C., Carter N.P., Chapman J.C., Clamp M., Clark G., Clark L.N., Clark S.Y., Clee C.M., Clegg S., Cobley V.E., Collier R.E., Connor R.E., Corby N.R., Coulson A., Coville G.J., Deadman R., Dhami P.D., Dunn M., Ellington A.G., Frankland J.A., Fraser A., French L., Garner P., Grafham D.V., Griffiths C., Griffiths M.N.D., Gwilliam R., Hall R.E., Hammond S., Harley J.L., Heath P.D., Ho S., Holden J.L., Howden P.J., Huckle E., Hunt A.R., Hunt S.E., Jekosch K., Johnson C.M., Johnson D., Kay M.P., Kimberley A.M., King A., Knights A., Laird G.K., Lawlor S., Lehvaeslaiho M.H., Leversha M.A., Lloyd C., Lloyd D.M., Lovell J.D., Marsh V.L., Martin S.L., McConnachie L.J., McLay K., McMurray A.A., Milne S.A., Mistry D., Moore M.J.F., Mullikin J.C., Nickerson T., Oliver K., Parker A., Patel R., Pearce T.A.V., Peck A.I., Phillimore B.J.C.T., Prathalingam S.R., Plumb R.W., Ramsay H., Rice C.M., Ross M.T., Scott C.E., Sehra H.K., Shownkeen R., Sims S., Skuce C.D., Smith M.L., Soderlund C., Steward C.A., Sulston J.E., Swann R.M., Sycamore N., Taylor R., Tee L., Thomas D.W., Thorpe A., Tracey A., Tromans A.C., Vaudin M., Wall M., Wallis J.M., Whitehead S.L., Whittaker P., Willey D.L., Williams L., Williams S.A., Wilming L., Wray P.W., Hubbard T., Durbin R.M., Bentley D.R., Beck S., Rogers J.
Nature 414:865-871(2001) [PubMed: 11780052] [Abstract]
Cited for: NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
[4]"Prediction of the coding sequences of unidentified human genes. XVI. The complete sequences of 150 new cDNA clones from brain which code for large proteins in vitro."
Nagase T., Kikuno R., Ishikawa K., Hirosawa M., Ohara O.
DNA Res. 7:65-73(2000) [PubMed: 10718198] [Abstract]
Cited for: NUCLEOTIDE SEQUENCE [LARGE SCALE MRNA] OF 39-1659 (ISOFORM 1), VARIANT GLU-1340.
Tissue: Brain.
[5]"Construction of expression-ready cDNA clones for KIAA genes: manual curation of 330 KIAA cDNA clones."
Nakajima D., Okazaki N., Yamakawa H., Kikuno R., Ohara O., Nagase T.
DNA Res. 9:99-106(2002) [PubMed: 12168954] [Abstract]
Cited for: SEQUENCE REVISION.
[6]"The status, quality, and expansion of the NIH full-length cDNA project: the Mammalian Gene Collection (MGC)."
The MGC Project Team
Genome Res. 14:2121-2127(2004) [PubMed: 15489334] [Abstract]
Cited for: NUCLEOTIDE SEQUENCE [LARGE SCALE MRNA] OF 177-1659 (ISOFORM 1), VARIANT GLU-1340.
Tissue: Eye.
[7]"The full-ORF clone resource of the German cDNA consortium."
Bechtel S., Rosenfelder H., Duda A., Schmidt C.P., Ernst U., Wellenreuther R., Mehrle A., Schuster C., Bahr A., Bloecker H., Heubner D., Hoerlein A., Michel G., Wedler H., Koehrer K., Ottenwaelder B., Poustka A., Wiemann S., Schupp I.
BMC Genomics 8:399-399(2007) [PubMed: 17974005] [Abstract]
Cited for: NUCLEOTIDE SEQUENCE [LARGE SCALE MRNA] OF 337-1659 (ISOFORM 1), VARIANTS MET-659; HIS-786; ILE-1240 AND GLU-1340.
Tissue: Melanoma.
[8]"Automated phosphoproteome analysis for cultured cancer cells by two-dimensional nanoLC-MS using a calcined titania/C18 biphasic column."
Imami K., Sugiyama N., Kyono Y., Tomita M., Ishihama Y.
Anal. Sci. 24:161-166(2008) [PubMed: 18187866] [Abstract]
Cited for: PHOSPHORYLATION [LARGE SCALE ANALYSIS] AT SER-436, MASS SPECTROMETRY.
+Additional computationally mapped references.

Cross-references

Sequence databases

EMBL
GenBank
DDBJ
AJ320261 mRNA. Translation: CAC86401.1.
AL136579 mRNA. Translation: CAB66514.1.
AL133342, AL035106, AL445192 Genomic DNA. Translation: CAI23274.1.
AL445192, AL035106, AL133342 Genomic DNA. Translation: CAI39886.1.
AL035106, AL445192, AL133342 Genomic DNA. Translation: CAI43186.1.
AB037836 mRNA. Translation: BAA92653.2.
BC053616 mRNA. Translation: AAH53616.1.
AL832913 mRNA. Translation: CAH10614.1.
IPIIPI00218429.
IPI00295252.
IPI00552692.
RefSeqNP_065871.2.
UniGeneHs.153310

3D structure databases

SMRQ8TCU6. Positions 48-393, 416-494, 528-596, 625-772.
ModBaseSearch...

Protein-protein interaction databases

IntActQ8TCU6. 5 interactions.
STRINGQ8TCU6.

PTM databases

PhosphoSiteQ8TCU6.

Proteomic databases

PRIDEQ8TCU6.

Genome annotation databases

EnsemblENST00000371941; ENSP00000361009; ENSG00000124126; Homo sapiens. [Genome view]
GeneID57580.
KEGGhsa:57580.
NMPDRfig|9606.3.peg.20430.
UCSCuc002xtv.1. human.
uc002xtw.1. human.

Organism-specific databases

CTD57580.
GeneCardsGC20M046674.
H-InvDBHIX0022544.
HIX0027727.
HGNCHGNC:32594. PREX1.
HPAHPA001927.
MIM606905. gene.
HUGESearch...
GenAtlasSearch...

Phylogenomic databases

eggNOGprNOG19340.
HOVERGENQ8TCU6.
InParanoidQ8TCU6.
OMAKDRDYHL.
OrthoDBEOG976NKR.
PhylomeDBQ8TCU6.

Enzyme and pathway databases

Pathway_Interaction_DBpi3kcipathway. Class I PI3K signaling events.
ReactomeREACT_11044. Signaling by Rho GTPases.
REACT_11061. Signalling by NGF.
REACT_14797. Signaling by GPCR.

Gene expression databases

ArrayExpressQ8TCU6.
BgeeQ8TCU6.
GenevestigatorQ8TCU6.
GermOnlineENSG00000124126. Homo sapiens.

Family and domain databases

InterProIPR000591. DEP_dom.
IPR000219. DH-domain.
IPR001331. GDS_CDC24_CS.
IPR001478. PDZ/DHR/GLGF.
IPR001849. Pleckstrin_homology.
IPR011991. WHTH_trsnscrt_rep_DNA-bd.
[Graphical view]
Gene3DG3DSA:1.20.900.10. RhoGEF. 1 hit.
G3DSA:1.10.10.10. Wing_hlx_DNA_bd. 2 hits.
PfamPF00610. DEP. 2 hits.
PF00169. PH. 1 hit.
PF00621. RhoGEF. 1 hit.
[Graphical view]
SMARTSM00049. DEP. 2 hits.
SM00228. PDZ. 2 hits.
SM00233. PH. 1 hit.
SM00325. RhoGEF. 1 hit.
[Graphical view]
PROSITEPS50186. DEP. 2 hits.
PS00741. DH_1. 1 hit.
PS50010. DH_2. 1 hit.
PS50106. PDZ. 1 hit.
PS50003. PH_DOMAIN. 1 hit.
[Graphical view]
ProtoNetSearch...

Other Resources

NextBio64135.
SOURCESearch...

Entry information

Entry namePREX1_HUMAN
AccessionPrimary (citable) accession number: Q8TCU6
Secondary accession number(s): Q5JS95 expand/collapse secondary AC list , Q5JS96, Q69YL2, Q7Z2L9, Q9BQH0, Q9BX55, Q9H4Q6, Q9P2D2, Q9UGQ4
Entry history
Integrated into UniProtKB/Swiss-Prot: January 17, 2003
Last sequence update: May 29, 2007
Last modified: February 9, 2010
This is version 84 of the entry and version 3 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.

Relevant documents

Human chromosome 20

Human chromosome 20: entries, gene names and cross-references to MIM

Human entries with polymorphisms or disease mutations

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

SIMILARITY comments

Index of protein domains and families

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