Novel mutant human fibronectin FIII9-10 domain pair with increased conformational stability and biological activity.

Novel mutant human fibronectin FIII9-10 domain pair with increased conformational stability and biological activity.
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新型突变人纤连蛋白 FIII9-10 结构域对,具有更高的构象稳定性和生物活性。

DOI:
10.1093/protein/15.12.1021
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发表时间:
2002-12
期刊:
Protein engineering
影响因子:
--
通讯作者:
Mardon HJ
Mardon HJ
中科院分区:
其他
文献类型:
--
作者:
van der Walle CF;Altroff H;Mardon HJ

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人纤连蛋白的中央细胞结合结构域中的第九和第十III型结构域(FIII 9 -10)含有整联蛋白受体结合位点,包括FIII 10中的RGD和FIII 9中的协同位点PHSRN。通过使用含有FIII 9 -10结构域对的人纤连蛋白的野生型和突变体片段,已经鉴定了有助于细胞结合的特定氨基酸。在高浓度下,FIII 9 -10在很大程度上模拟全长纤连蛋白分子的生物活性。然而,即使在FIII 9 -10对的情况下,FIII 9也是构象不稳定的。在这里,我们报告了一系列的杂交小鼠-人FIII 9 -10对,赋予不同程度的构象稳定性FIII 9的建设。通过用Pro取代Leu 1408,人FIII 9模块的构象稳定性增加2-3倍。我们证明,这种突变体的生物活性增强。所得的FIII 9 -10突变体具有良好的溶液性质,并将提供一个模板,可以将进一步的突变掺入其中,以探测纤连蛋白的细胞结合模块的结构-功能关系。
The ninth and tenth type III domains (FIII9–10) in the central cell binding domain of human fibronectin contain integrin receptor binding sites, including RGD in FIII10 and a synergy site, PHSRN, in FIII9. The specific amino acids that contribute to cell binding have been identified by the use of wild-type and mutant fragments of human fibronectin containing the FIII9–10 domain pair. At high concentrations FIII9–10 mimics, to a large extent, the biological activity of the full-length fibronectin molecule. However, FIII9 is conformationally unstable, even in the context of the FIII9–10 pair. Here we report the construction of a series of hybrid mouse–human FIII9–10 pairs that confer varying degrees of conformational stability to FIII9. The conformational stability of the human FIII9 module was increased 2–3-fold by substitution of Leu1408 with Pro. We demonstrate that the biological activity of this mutant is enhanced. The resulting FIII9–10 mutant has good solution properties and will provide a template into which further mutations can be incorporated in order to probe the structure–function relationship of the cell binding module of fibronectin.
DOI: 10.1016/0896-6273(94)90326-3
发表时间: 1994-04-01
期刊: NEURON
影响因子: 16.2
作者:
HUBER, AH;WANG, YME;BJORKMAN, PJ
通讯作者: BJORKMAN, PJ
DOI: 10.1016/0955-0674(94)90090-6
发表时间: 1994-10-01
影响因子: 7.5
作者:
POTTS, JR;CAMPBELL, ID
通讯作者: CAMPBELL, ID
DOI: 10.1083/jcb.149.2.521
发表时间: 2000-04-17
期刊: The Journal of cell biology
影响因子: --
作者:
Redick SD;Settles DL;Briscoe G;Erickson HP
通讯作者: Erickson HP
DOI: 10.1016/0022-2836(94)90013-2
发表时间: 1994-03-04
影响因子: 5.6
作者:
DICKINSON, CD;VEERAPANDIAN, B;ELY, KR
通讯作者: ELY, KR
DOI: 10.1016/0092-8674(92)90600-h
发表时间: 1992-11-13
期刊: CELL
影响因子: 64.5
作者:
MAIN, AL;HARVEY, TS;CAMPBELL, ID
通讯作者: CAMPBELL, ID