Structural adaptation of tooth enamel protein amelogenin in the presence of SDS micelles.
Structural adaptation of tooth enamel protein amelogenin in the presence of SDS micelles.
复制标题
在存在SDS胶束的情况下,牙齿搪瓷蛋白蛋白蛋白的结构适应。
DOI:
10.1002/bip.22415
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发表时间:
2014-05
期刊:
影响因子:
2.9
通讯作者:
Moradian-Oldak, Janet
中科院分区:
文献类型:
--
作者:
Chandrababu, Karthik Balakrishna;Dutta, Kaushik;Lokappa, Sowmya Bekshe;Ndao, Moise;Evans, John Spencer;Moradian-Oldak, Janet
Amelogenin, the major extracellular matrix protein of developing tooth enamel is intrinsically disordered. Through its interaction with other proteins and mineral, amelogenin assists enamel biomineralization by controlling the formation of highly organized enamel crystal arrays. We used circular dichroism (CD), dynamic light scattering (DLS), fluorescence and NMR spectroscopy to investigate the folding propensity of recombinant porcine amelogenin rP172 following its interaction with SDS, at levels above critical micelle concentration. The rP172-SDS complex formation was confirmed by DLS, while an increase in the structure moiety of rP172 was noted through CD and fluorescence experiments. Fluorescence quenching analyses performed on several rP172 mutants where all but one Trp was replaced by Tyr at different sequence regions confirmed that the interaction of amelogenin with SDS micelles occurs via the N-terminal region close to Trp25 where helical segments can be detected by NMR. NMR spectroscopy and structural refinement calculations using CS-Rosetta modelling confirm that the highly conserved N-terminal domain is prone to form helical structure when bound to SDS micelles. Our findings reported here reveal interactions leading to significant changes in the secondary structure of rP172 upon treatment with SDS. These interactions may reflect the physiological relevance of the flexible nature of amelogenin and its sequence specific helical propensity that might enable it to structurally adapt with charged and potential targets such as cell surface, mineral, and other proteins during enamel biomineralization.
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影响因子:
3
作者:
Gallon, Victoria;Chen, Lisha;Yang, Xiudong;Moradian-Oldak, Janet
通讯作者:
Moradian-Oldak, Janet
影响因子:
2.9
作者:
Buchko, Garry W.;Tarasevich, Barbara J.;Bekhazi, Jacky;Snead, Malcolm L.;Shaw, Wendy J.
通讯作者:
Shaw, Wendy J.
影响因子:
2.7
作者:
Bromley, Keith M.;Lakshminarayanan, Rajamani;Moradian-Oldak, Janet
通讯作者:
Moradian-Oldak, Janet
影响因子:
4.8
作者:
Bromley, Keith M.;Kiss, Andrew S.;Moradian-Oldak, Janet
通讯作者:
Moradian-Oldak, Janet
影响因子:
2.9
作者:
Lakshminarayanan, Rajamani;Yoon, Il;Hegde, Balachandra G.;Fan, Daming;Du, Chang;Moradian-Oldak, Janet
通讯作者:
Moradian-Oldak, Janet