Human α spectrin II and the FANCA, FANCC, and FANCG proteins bind to DNA containing psoralen interstrand cross-links

L. W. McMahon, J. Sangerman, Steven Goodman, K. Kumaresan, M. W. Lambert

Research output: Contribution to journalArticle

64 Citations (Scopus)

Abstract

Repair of DNA interstrand cross-links is a complex process critical to which is the identification of sites of damage by specific proteins. We have recently identified the structural protein nonerythroid α spectrin (αSpIIΣ*) as a component of a nuclear protein complex in normal human cells which is involved in the repair of DNA interstrand cross-links and have shown that it forms a complex with the Fanconi anemia proteins FANCA, FANCC, and FANCG. Using DNA affinity chromatography, we now show that αSpIIΣ*, present in HeLa cell nuclei, specifically binds to DNA containing psoralen interstrand cross-links and that the FANCA, FANCC, and FANCG proteins are bound to this damaged DNA as well. That spectrin binds directly to the cross-linked DNA has been shown using purified bovine brain spectrin (αSpIIΣ1/βSpIIΣ1)2. Binding of the Fanconi anemia (FA) proteins to the damaged DNA may be either direct or indirect via their association with αSpIIΣ*. These results demonstrate a role for α spectrin in the nucleus as well as a new function for this protein in the cell, an involvement in DNA repair. αSpIIΣ* may bind to cross-linked DNA and act as a scaffold to help in the recruitment of repair proteins to the site of damage and aid in their alignment and interaction with each other, thus enhancing the efficiency of the repair process.

Original languageEnglish (US)
Pages (from-to)7025-7034
Number of pages10
JournalBiochemistry
Volume40
Issue number24
StatePublished - Jun 19 2001
Externally publishedYes

Fingerprint

Fanconi Anemia Complementation Group G Protein
Fanconi Anemia Complementation Group A Protein
Fanconi Anemia Complementation Group C Protein
Ficusin
Spectrin
DNA
Fanconi Anemia Complementation Group Proteins
DNA Repair
Repair
Proteins
Nuclear Proteins
Cell Nucleus
Affinity Chromatography
HeLa Cells
Cells
Affinity chromatography
Scaffolds

All Science Journal Classification (ASJC) codes

  • Biochemistry

Cite this

Human α spectrin II and the FANCA, FANCC, and FANCG proteins bind to DNA containing psoralen interstrand cross-links. / McMahon, L. W.; Sangerman, J.; Goodman, Steven; Kumaresan, K.; Lambert, M. W.

In: Biochemistry, Vol. 40, No. 24, 19.06.2001, p. 7025-7034.

Research output: Contribution to journalArticle

McMahon, LW, Sangerman, J, Goodman, S, Kumaresan, K & Lambert, MW 2001, 'Human α spectrin II and the FANCA, FANCC, and FANCG proteins bind to DNA containing psoralen interstrand cross-links', Biochemistry, vol. 40, no. 24, pp. 7025-7034.
McMahon, L. W. ; Sangerman, J. ; Goodman, Steven ; Kumaresan, K. ; Lambert, M. W. / Human α spectrin II and the FANCA, FANCC, and FANCG proteins bind to DNA containing psoralen interstrand cross-links. In: Biochemistry. 2001 ; Vol. 40, No. 24. pp. 7025-7034.
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