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嗜盐蛋白高级结构对其稳定性的影响

DOI: 10.11830/ISSN.1000-5013.2012.06.0655

Keywords: 嗜盐蛋白, 非嗜盐蛋白, 二级结构, 可及性表面积, 溶剂可及性, 嗜盐机制

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Abstract:

选择30对具有晶体结构的嗜盐和非嗜盐同源蛋白,通过计算氨基酸所处的结构状态,找出二者在统计学上具有显著差异的氨基酸.研究结果表明:在总的氨基酸组成上,嗜盐蛋白中天冬氨酸含量更多,而苯丙氨酸和赖氨酸含量显著较少.在不同二级结构区域,β-折叠中两种蛋白氨基酸组成差异最大;而在不同溶剂可及表面,两种蛋白在分别表面氨基酸组成差异最大,嗜盐蛋白表面酸性氨基酸显著较多,而碱性氨基酸则较少;48种高级结构结构参数中有4种存在显著差异,这4种结构参数都与可及性表面积有关.

References

[1]  吕爱军,胡斌,温洪宇,等.极端嗜盐菌的特性及其应用前景[J].微生物学杂志,2005,25(2):65-68.
[2]  PANAGIOTIS L,KASTRITIS N C,PAPANDREOU S J H.Haloadaptation: Insights from comparative modeling studies of halophilic archaeal DHFRs[J].International Journal of Biological Macromolecules,2007,41(4):447-453.
[3]  PAUL S,BAG S K,DAS S,et al.Molecular signature of hypersaline adaptation: Insights from genome and proteome composition of halophilic prokaryotes[J].Genome Biology,2008,9(4):R70.
[4]  PACK S P,YOO Y J.Protein thermo-stability: Structure-based difference of amino acid between thermophilic and mesophilic proteins[J].Journal of Biotechnology,2004,111(3):269-277.
[5]  孙桂鸿,郭明雄,龚睿,等.人朊病毒蛋白及其突变体的溶剂可及性和模拟分析[J].中国病毒学,2004,19(2):158-162.
[6]  BERMAN H M.The protein data bank: A historical perspective[J].Acta Crystallographica,2008(A64):88-95.
[7]  KABSCH W,SANDER C.Dictionary of protein secondary structure: Pattern recognition of hydrogen-bonded and geometrical features[J].Biopolymers,1983,22(12):2577-2637.
[8]  POIIASTRI G,JMMARTEN A,MOONEY C,et al.Accurate prediction of protein secondary structure and solvent accessibility by consensus combiners of sequence and structure information[J].BMC Bioinformatics,2007,8:201.
[9]  GLYAKINAL A V,GARBUZYNSKIY S O,LOBANOV M Y,et al.Different packing of external residues can explain differences in the thermostability of proteins from thermophilic and mesophilic organisms[J].Bioinformatics,2007,23(17):2231-2238.
[10]  WILLARD L,RANJAN A,ZHANG H,et al.VADAR: A web server for quantitative evaluation of protein structure quality[J].Nucleic Acids Res,2003,31(13):3316-3319.
[11]  KABSCH W,SANDER C.Dictionary of protein secondary structure: Pattern recognition of hydrogen-bonded and geometrical features[J].Biopolymer,1983,22(12):2577-2637.
[12]  KUMAR S,TSAI C J,NUSSINOV R.Factors enhancing protein thermostability[J].Protein Engineering,2000,13(3):179-191.
[13]  AKASAKO A,HARUKI M,OOBATAKE M,et al.Conformational stabilities of Escherichia coli RNase HI variants with a series of amino acid substitution at a cavity within the hydrophobic core[J].Journal of Biological Chemistry,1997,272(30):18686-18693.

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