ABCG2 p.Phe507Ser
| Predicted by SNAP2: | A: D (63%), C: N (53%), D: D (85%), E: D (80%), G: D (71%), H: D (80%), I: D (59%), K: D (85%), L: N (53%), M: D (59%), N: D (80%), P: D (85%), Q: D (75%), R: D (80%), S: D (63%), T: D (71%), V: D (66%), W: D (66%), Y: D (71%), |
| Predicted by PROVEAN: | A: D, C: D, D: D, E: D, G: D, H: D, I: D, K: D, L: D, M: D, N: D, P: D, Q: D, R: D, S: D, T: D, V: D, W: D, Y: N, |
[switch to compact view]
Comments [show]
None has been submitted yet.
[hide] Functional assessment of ABCG2 (BCRP) gene polymor... Drug Metab Dispos. 2005 Jan;33(1):94-101. Epub 2004 Oct 8. Kobayashi D, Ieiri I, Hirota T, Takane H, Maegawa S, Kigawa J, Suzuki H, Nanba E, Oshimura M, Terakawa N, Otsubo K, Mine K, Sugiyama Y
Functional assessment of ABCG2 (BCRP) gene polymorphisms to protein expression in human placenta.
Drug Metab Dispos. 2005 Jan;33(1):94-101. Epub 2004 Oct 8., [PMID:15475413]
Abstract [show]
The aim of the present study was to assess the contribution of polymorphisms in the breast cancer resistance protein/ATP-binding cassette transporter G2 (BCRP/ABCG2) gene to the placental expression from a new perspective, allelic imbalance. Polymorphisms were screened by polymerase chain reaction (PCR)-single-strand conformation polymorphism analysis followed by sequencing with DNA extracted from 100 placentas. To examine whether polymorphisms of the BCRP gene correlate with the placental BCRP expression, we determined mRNA and protein levels by quantitative real-time PCR and Western blotting, respectively. In placentas, G34A (Val(12)Met) and C421A (Gln(141)Lys) were frequently observed (18-36%), but C376T, which creates a stop codon (Gln(126) stop codon), was found with an allelic frequency of 1%. The mean of the BCRP protein level was significantly lower (p < 0.05) in homozygotes for the A421 allele than in those for the C421 allele, and heterozygotes had an intermediate value. To evaluate whether the C421A polymorphism acts as a cis-element in BCRP transcription, allelic imbalance was determined using informative lymphoblasts and 56 samples of placental cDNA. In most of the placental samples we tested, the difference in expression levels between the two alleles was small, and only two samples indicated a monoallelic expression (i.e., preferential expression of one allele). These results suggest that 1) the predominant allelic expression pattern of BCRP in placental samples is biallelic, and 2) the mutation C421A is not a genetic variant acting in cis, but is considered to influence the translation efficiency.
Comments [show]
None has been submitted yet.
No. Sentence Comment
116 Another polymorphism, a C1515 deletion, which results in a frame shift (Phe506Ser, Phe507Ser, Val508Leu, and Met509stop), was extremely rare (0.5%) in our samples.
X
ABCG2 p.Phe507Ser 15475413:116:83
status: VERIFIED