Variant position:  545

Type of variant:  LP/P [Disclaimer: Variants classification is intended for research purposes only, not for clinical and diagnostic use. The label disease variant is assigned according to literature reports on probable disease-association that can be based on theoretical reasons. This label must not be considered as a definitive proof for the pathogenic role of a variant.]

Residue change:  From Glutamate (E) to Lysine (K) at position 545 (E545K, p.Glu545Lys).

Physico-chemical properties:  Change from medium size and acidic (E) to large size and basic (K)

BLOSUM score:  1

Variant description:  In MCAP, KERSEB, CRC and BC; shows an increase in lipid kinase activity; oncogenic in vivo; occurs in the interface between the PI3K helical domain and the nSH2 (N-terminal SH2) region of the p85 regulatory subunit and may reduce the inhibitory effect of p85; requires interaction with RAS to induce cellular transformation; enhances invadopodia-mediated extracellular matrix degradation and invasion in breast cancer cells.

Other resources:  

• Variant rs104886003 [ dbSNP | Ensembl ]

Variant position:  545

Protein sequence length:  1068

Location on the sequence:   ENDKEQLKAISTRDPLSEIT  E QEKDFLWSHRHYCVTIPEIL

Residue conservation: 

Human                         ENDKEQLKAISTRDPLSEITEQEKDFLWSHRHYCVTIPEIL

Mouse                         ENDKEQLRALCTRDPLSEITEQEKDFLWSHRHYCVTIPEIL

Rat                           ENDKEQLRALCTRDPLSEITEQEKDFLWSHRHYCVTIPEIL

Bovine                        ENDKEQLRAICTRDPLSEITEQEKDFLWSHRHYCVTIPEIL

Sequence annotation in neighborhood:  

Phosphoinositide 3-kinase signaling pathway mediated by p110{alpha} regulates invadopodia formation.
Yamaguchi H.; Yoshida S.; Muroi E.; Yoshida N.; Kawamura M.; Kouchi Z.; Nakamura Y.; Sakai R.; Fukami K.;
J. Cell Biol. 193:1275-1288(2011)
Cited for: FUNCTION IN INVADOPODIA FORMATION; CHARACTERIZATION OF VARIANTS LYS-545 AND ARG-1047;

Mutations of PIK3CA in anaplastic oligodendrogliomas, high-grade astrocytomas, and medulloblastomas.
Broderick D.K.; Di C.; Parrett T.J.; Samuels Y.R.; Cummins J.M.; McLendon R.E.; Fults D.W.; Velculescu V.E.; Bigner D.D.; Yan H.;
Cancer Res. 64:5048-5050(2004)
Cited for: VARIANTS CANCER LYS-542; LYS-545; PRO-546; ASN-1021; ARG-1047; LEU-1047 AND TYR-1065;

Mutation of the PIK3CA gene in ovarian and breast cancer.
Campbell I.G.; Russell S.E.; Choong D.Y.H.; Montgomery K.G.; Ciavarella M.L.; Hooi C.S.F.; Cristiano B.E.; Pearson R.B.; Phillips W.A.;
Cancer Res. 64:7678-7681(2004)
Cited for: INVOLVEMENT IN OC; VARIANTS CANCER GLY-545; LYS-545; LYS-546; GLU-546; ARG-1047 AND LEU-1047;

Mutations of PIK3CA in gastric adenocarcinoma.
Li V.S.W.; Wong C.W.; Chan T.L.; Chan A.S.W.; Zhao W.; Chu K.-M.; So S.; Chen X.; Yuen S.T.; Leung S.Y.;
BMC Cancer 5:29-29(2005)
Cited for: VARIANTS CANCER LYS-542; LYS-545 AND ARG-1047;

Functional analysis of PIK3CA gene mutations in human colorectal cancer.
Ikenoue T.; Kanai F.; Hikiba Y.; Obata T.; Tanaka Y.; Imamura J.; Ohta M.; Jazag A.; Guleng B.; Tateishi K.; Asaoka Y.; Matsumura M.; Kawabe T.; Omata M.;
Cancer Res. 65:4562-4567(2005)
Cited for: INVOLVEMENT IN CRC; CHARACTERIZATION OF VARIANTS CRC HIS-38; VAL-106; ARG-420; GLN-453; LYS-542; LYS-545; ILE-1043 AND ARG-1047;

High frequency of coexistent mutations of PIK3CA and PTEN genes in endometrial carcinoma.
Oda K.; Stokoe D.; Taketani Y.; McCormick F.;
Cancer Res. 65:10669-10673(2005)
Cited for: VARIANTS CANCER GLN-542; LYS-542; GLY-545; LYS-545; ARG-1007; HIS-1021; CYS-1021; VAL-1035; ILE-1043; TYR-1047; ARG-1047; ASP-1050; LYS-1052 AND LEU-1065;

The prevalence of PIK3CA mutations in gastric and colon cancer.
Velho S.; Oliveira C.; Ferreira A.; Ferreira A.C.; Suriano G.; Schwartz S. Jr.; Duval A.; Carneiro F.; Machado J.C.; Hamelin R.; Seruca R.;
Eur. J. Cancer 41:1649-1654(2005)
Cited for: INVOLVEMENT IN CRC; VARIANTS CANCER LYS-542; GLY-545; LYS-545; GLN-1023; ARG-1047 AND LEU-1047;

PIK3CA mutations in advanced ovarian carcinomas.
Wang Y.; Helland A.; Holm R.; Kristensen G.B.; Boerresen-Dale A.-L.;
Hum. Mutat. 25:322-322(2005)
Cited for: VARIANTS CANCER LYS-545 AND ARG-1047;

PIK3CA mutations in head and neck squamous cell carcinoma.
Qiu W.; Schoenleben F.; Li X.; Ho D.J.; Close L.G.; Manolidis S.; Bennett B.P.; Su G.H.;
Clin. Cancer Res. 12:1441-1446(2006)
Cited for: VARIANTS CANCER CYS-343; LYS-542; LYS-545 AND ARG-1047; VARIANT MET-391;

PIK3CA mutation and histological type in breast carcinoma: high frequency of mutations in lobular carcinoma.
Buttitta F.; Felicioni L.; Barassi F.; Martella C.; Paolizzi D.; Fresu G.; Salvatore S.; Cuccurullo F.; Mezzetti A.; Campani D.; Marchetti A.;
J. Pathol. 208:350-355(2006)
Cited for: VARIANTS BC LYS-542; VAL-542; LYS-545; ARG-546; ARG-1047 AND LEU-1047;

Cancer-specific mutations in PIK3CA are oncogenic in vivo.
Bader A.G.; Kang S.; Vogt P.K.;
Proc. Natl. Acad. Sci. U.S.A. 103:1475-1479(2006)
Cited for: CHARACTERIZATION OF VARIANTS CANCER LYS-542; LYS-545 AND ARG-1047;

Oncogenic PIK3CA mutations occur in epidermal nevi and seborrheic keratoses with a characteristic mutation pattern.
Hafner C.; Lopez-Knowles E.; Luis N.M.; Toll A.; Baselga E.; Fernandez-Casado A.; Hernandez S.; Ribe A.; Mentzel T.; Stoehr R.; Hofstaedter F.; Landthaler M.; Vogt T.; Pujol R.M.; Hartmann A.; Real F.X.;
Proc. Natl. Acad. Sci. U.S.A. 104:13450-13454(2007)
Cited for: VARIANTS KERSEB LYS-542; LYS-545; GLY-545 AND ARG-1047;

De novo germline and postzygotic mutations in AKT3, PIK3R2 and PIK3CA cause a spectrum of related megalencephaly syndromes.
Riviere J.B.; Mirzaa G.M.; O'Roak B.J.; Beddaoui M.; Alcantara D.; Conway R.L.; St-Onge J.; Schwartzentruber J.A.; Gripp K.W.; Nikkel S.M.; Worthylake T.; Sullivan C.T.; Ward T.R.; Butler H.E.; Kramer N.A.; Albrecht B.; Armour C.M.; Armstrong L.; Caluseriu O.; Cytrynbaum C.; Drolet B.A.; Innes A.M.; Lauzon J.L.; Lin A.E.; Mancini G.M.; Meschino W.S.; Reggin J.D.; Saggar A.K.; Lerman-Sagie T.; Uyanik G.; Weksberg R.; Zirn B.; Beaulieu C.L.; Majewski J.; Bulman D.E.; O'Driscoll M.; Shendure J.; Graham J.M. Jr.; Boycott K.M.; Dobyns W.B.;
Nat. Genet. 44:934-940(2012)
Cited for: VARIANTS MCAP LYS-81; GLN-88; ARG-364; LYS-365; TYR-378; GLU-453 DEL; LYS-545; LYS-726; ARG-914; CYS-1021; ALA-1025; VAL-1035; ILE-1043; TYR-1047 AND SER-1049;