Individual breathing reactions measured in hemoglobin by hydrogen exchange methods.

Individual breathing reactions measured in hemoglobin by hydrogen exchange methods.
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通过氢交换方法测量血红蛋白的个体呼吸反应。

DOI:
10.1016/s0006-3495(80)84991-5
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发表时间:
1980
影响因子:
3.4
通讯作者:
Rogero,JR
Rogero,JR
中科院分区:
生物学3区
文献类型:
--
作者:
Englander,SW;Calhoun,DB;Englander,JJ;Kallenbach,NR;Liem,RK;Malin,EL;Mandal,C;Rogero,JR

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蛋白质氢交换通常被认为记录了蛋白质内部动力学的某些方面,但工作中的运动类型尚不清楚。实验正在进行,以确定蛋白质氢交换的决定因素,并区分当地展开和可及性渗透机制。小分子、多核苷酸和蛋白质的结果表明,溶剂可及性绝不足以进行快速交换。H-交换减慢通常与分子内H-键合有关,交换过程主要取决于瞬时H-键断裂。至少在α-螺旋结构中,氢键断裂的合作方面必须在局部解折叠反应中表达。通过使用差分氢交换方法获得的结果似乎提供了一个直接测量的瞬时,合作,本地展开反应血红蛋白。这些假定的连贯呼吸单位的真实性正在通过使用不同的H-交换方法来一次标记一个单位,然后尝试通过将蛋白质片段化,分离片段并测试它们的标记来定位氚。初步结果证明了这种方法的可行性。
Protein hydrogen exchange is generally believed to register some aspects of internal protein dynamics, but the kind of motion at work is not clear. Experiments are being done to identify the determinants of protein hydrogen exchange and to distinguish between local unfolding and accessibility-penetration mechanisms. Results with small molecules, polynucleotides, and proteins demonstrate that solvent accessibility is by no means sufficient for fast exchange. H-exchange slowing is quite generally connected with intramolecular H-bonding, and the exchange process depends pivotally on transient H-bond cleavage. At least in alpha-helical structures, the cooperative aspect of H-bond cleavage must be expressed in local unfolding reactions. Results obtained by use of a difference hydrogen exchange method appear to provide a direct measurement of transient, cooperative, local unfolding reactions in hemoglobin. The reality of these supposed coherent breathing units is being tested by using the difference H-exchange approach to tritium label the units one at a time and then attempting to locate the tritium by fragmenting the protein, separating the fragments, and testing them for label. Early results demonstrate the feasibility of this approach.
血红蛋白协同效应的立体化学。
DOI: --
发表时间: 1972
期刊: Cold Spring Harbor Symposia on Quantitative Biology
影响因子: --
作者:
M. Perutz;L. F. Teneyck
通讯作者: L. F. Teneyck
DOI: --
发表时间: 1974
影响因子: 4.8
作者:
R. Ghose;S. Englander
通讯作者: S. Englander
DOI: --
发表时间: 1979
影响因子: 5.6
作者:
C. Mandal;Neville R. Kallenbach;S. Englander
通讯作者: S. Englander
一些多核苷酸和转移RNA的氢交换研究。
DOI: --
发表时间: 1972
影响因子: 5.6
作者:
J. J. Englander;N. Kallenbach;S. Englander
通讯作者: S. Englander
蛋白质功能的移动缺陷假说
DOI: --
发表时间: 1975
期刊:
影响因子: --
作者:
R. Lumry;A. Rosenberg
通讯作者: A. Rosenberg