دورية أكاديمية
XRCC4 Protein Interactions with XRCC4-like Factor (XLF) Create an Extended Grooved Scaffold for DNA Ligation and Double Strand Break Repair
| العنوان: | XRCC4 Protein Interactions with XRCC4-like Factor (XLF) Create an Extended Grooved Scaffold for DNA Ligation and Double Strand Break Repair |
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| المؤلفون: | Hammel, Michal, Rey, Martial, Yu, Yaping, Mani, Rajam S., Classen, Scott, Liu, Mona, Pique, Michael E., Fang, Shujuan, Mahaney, Brandi L., Weinfeld, Michael, Schriemer, David C., Lees-Miller, Susan P., Tainer, John A. |
| بيانات النشر: | Journal of Biological Chemistry Physical Biosciences Division Lawrence Berkeley National Laboratory //www.jbc.org/ |
| سنة النشر: | 2011 |
| المجموعة: | PRISM - University of Calgary Digital Repository |
| مصطلحات موضوعية: | DNA Repair, Protein DNA-Interaction, Protein Structure, X-ray Crystallography, X-ray Scattering, DNA Ligase IV, Ku, XLF-XRCC4 Complex, Nonhomologous End Joining (NHEJ), Small Angle X-ray Scattering |
| الوصف: | The XRCC4-like factor (XLF)-XRCC4 complex is essential for nonhomologous end joining, the major repair pathway for DNA double strand breaks in human cells. Yet, how XLF binds XRCC4 and impacts nonhomologous end joining functions has been enigmatic. Here, we report the XLF-XRCC4 complex crystal structure in combination with biophysical and mutational analyses to define the XLF-XRCC4 interactions. Crystal and solution structures plus mutations characterize alternating XRCC4 and XLF head domain interfaces forming parallel super-helical filaments. XLF Leu-115 ("Leu-lock") inserts into a hydrophobic pocket formed by XRCC4 Met-59, Met-61, Lys-65, Lys-99, Phe-106, and Leu-108 in synergy with pseudo-symmetric β-zipper hydrogen bonds to drive specificity. XLF C terminus and DNA enhance parallel filament formation. Super-helical XLF-XRCC4 filaments form a positively charged channel to bind DNA and align ends for efficient ligation. Collective results reveal how human XLF and XRCC4 interact to bind DNA, suggest consequences of patient mutations, and support a unified molecular mechanism for XLF-XRCC4 stimulation of DNA ligation. ; National Institutes of Health; Canadian Institutes of Health Research; Alberta Cancer Foundation ; Yes ; This work was supported, in whole or in part, by National Institutes of Health Grant P01 CA92584 (Structural Cell Biology of DNA Repair Machines) (to J. A. T. and S. P. L.-M.). This work was also supported by Grant 69139 from the Canadian Institutes of Health Research and Grant 23817 from Alberta Cancer Foundation (to S. P. L.-M. and M. W.). |
| نوع الوثيقة: | article in journal/newspaper |
| وصف الملف: | application/pdf |
| اللغة: | English |
| العلاقة: | Hammel, M., Rey, M., Yu, Y., Mani, R. S., Classen, S., Liu, M., … Tainer, J. A. (2011). XRCC4 Protein Interactions with XRCC4-like Factor (XLF) Create an Extended Grooved Scaffold for DNA Ligation and Double Strand Break Repair. The Journal of Biological Chemistry, 286(37), 32638–32650. http://doi.org/10.1074/jbc.M111.272641Test; http://dx.doi.org/10.11575/PRISM/33390Test; NIH Grant P01 CA92584; CIHR Grant 69139; ACF Grant 23817; http://hdl.handle.net/1880/52208Test |
| DOI: | 10.1074/jbc.M111.272641 |
| DOI: | 10.11575/PRISM/33390 |
| الإتاحة: | https://doi.org/10.1074/jbc.M111.272641Test https://doi.org/10.11575/PRISM/33390Test http://hdl.handle.net/1880/52208Test |
| رقم الانضمام: | edsbas.9FFAF73D |
| قاعدة البيانات: | BASE |
| DOI: | 10.1074/jbc.M111.272641 |
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