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• W2038465596 endingPage "312" @default.
• W2038465596 startingPage "295" @default.
• W2038465596 abstract "The 155-kDa plasma glycoprotein factor H (FH), which consists of 20 complement control protein (CCP) modules, protects self-tissue but not foreign organisms from damage by the complement cascade. Protection is achieved by selective engagement of FH, via CCPs 1–4, CCPs 6–8 and CCPs 19–20, with polyanion-rich host surfaces that bear covalently attached, activation-specific, fragments of complement component C3. The role of intervening CCPs 9–18 in this process is obscured by lack of structural knowledge. We have concatenated new high-resolution solution structures of overlapping recombinant CCP pairs, 10–11 and 11–12, to form a three-dimensional structure of CCPs 10–12 and validated it by small-angle X-ray scattering of the recombinant triple‐module fragment. Superimposing CCP 12 of this 10–12 structure with CCP 12 from the previously solved CCP 12–13 structure yielded an S-shaped structure for CCPs 10–13 in which modules are tilted by 80–110° with respect to immediate neighbors, but the bend between CCPs 10 and 11 is counter to the arc traced by CCPs 11–13. Including this four-CCP structure in interpretation of scattering data for the longer recombinant segments, CCPs 10–15 and 8–15, implied flexible attachment of CCPs 8 and 9 to CCP 10 but compact and intimate arrangements of CCP 14 with CCPs 12, 13 and 15. Taken together with difficulties in recombinant production of module pairs 13–14 and 14–15, the aberrant structure of CCP 13 and the variability of 13–14 linker sequences among orthologues, a structural dependency of CCP 14 on its neighbors is suggested; this has implications for the FH mechanism." @default.
• W2038465596 created "2016-06-24" @default.
• W2038465596 creator A5002211632 @default.
• W2038465596 creator A5015641575 @default.
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• W2038465596 creator A5081712139 @default.
• W2038465596 creator A5086012146 @default.
• W2038465596 creator A5088832006 @default.
• W2038465596 date "2012-12-01" @default.
• W2038465596 modified "2023-10-13" @default.
• W2038465596 title "Solution Structure of CCP Modules 10–12 Illuminates Functional Architecture of the Complement Regulator, Factor H" @default.
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