期刊
BLOOD
卷 114, 期 1, 页码 174-180出版社
AMER SOC HEMATOLOGY
DOI: 10.1182/blood-2009-02-207811
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资金
- NHLBI NIH HHS [R01 HL084082, R01 HL081499] Funding Source: Medline
FANCM is a component of the Fanconi anemia ( FA) core complex and one FA patient (EUFA867) with biallelic mutations in FANCM has been described. Strikingly, we found that EUFA867 also carries biallelic mutations in FANCA. After correcting the FANCA defect in EUFA867 lymphoblasts, a clean FA-M cell line was generated. These cells were hypersensitive to mitomycin C, but unlike cells defective in other core complex members, FANCM(-/-) cells were proficient in monoubiquitinating FANCD2 and were sensitive to the topoisomerase inhibitor camptothecin, a feature shared only with the FA subtype D1 and N. In addition, FANCM(-/-) cells were sensitive to UV light. FANCM and a C-terminal deletion mutant rescued the cross-linker sensitivity of FANCM(-/-) cells, whereas a FANCM ATPase mutant did not. Because both mutants restored the formation of FANCD2 foci, we conclude that FANCM functions in an FA core complex dependent and -independent manner. (Blood. 2009; 114:174-180)
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