کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
2829039 1162781 2009 10 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Structure and topology of Slc11a1(164–191) with G169D mutation in membrane-mimetic environments
موضوعات مرتبط
علوم زیستی و بیوفناوری بیوشیمی، ژنتیک و زیست شناسی مولکولی زیست شناسی مولکولی
پیش نمایش صفحه اول مقاله
Structure and topology of Slc11a1(164–191) with G169D mutation in membrane-mimetic environments
چکیده انگلیسی

Solute carrier family 11 member 1 (Slc11a1) is a proton-mediated divalent metal cation transporter with 12 putative transmembrane domains. Variation in it reveals alterations in host resistance against intracellular pathogens. A naturally occurring glycine to aspartic acid mutation at position 169 (G169D) in the putative transmembrane domain 4 (TM4) makes mice susceptible to Salmonella typhimurim, Leishmania donovani, and Mycobacterium bovis. In this work, a 28-residue peptide corresponding to Slc11a1(164–191), including TM4 of Slc11a1, with G169D mutation is characterized using CD and NMR methods in 2,2,2-trifluoroethanol solvent and SDS micelles and the results of present study on the G169D peptide are compared with those of previous study on the wild-type peptide. Similarly to the wild-type peptide, the G169D peptide forms a predominantly α-helical structure and is totally embedded in SDS micelles as a homologous assembly. However, the G169D mutation changes the local conformation near the mutation site, the cooperative manner in proton binding of the residue Asp located in the center of SDS micelles and the interaction strength of this residue with Mn2+ ions.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Structural Biology - Volume 165, Issue 1, January 2009, Pages 27–36
نویسندگان
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