Dynamic motion and rearranged molecular shape of heme in myoglobin: structural and functional consequences.
Dynamic motion and rearranged molecular shape of heme in myoglobin: structural and functional consequences.
复制标题
肌红蛋白中血红素的动态运动和重新排列的分子形状:结构和功能后果。
DOI:
10.3390/molecules18033168
复制
发表时间:
2013-03-11
期刊:
影响因子:
--
通讯作者:
Neya S
中科院分区:
文献类型:
--
作者:
Neya S
Myoglobin, a simple oxygen binding protein, was reconstituted with various types of synthetic hemes to manipulate the heme-globin interactions. From the paramagnetic NMR analysis, small heme was found to rotate rapidly about the iron-histidine bond upon. This is a novel and typical example for the fluctuation of protein. The dynamic NMR analysis indicated that the 360° rotational rate of a small heme was 1,400 s−1 at room temperature. The X-ray analyses revealed that the tertiary structure of globin containing the smallest heme was closely similar to that of native protein despite extensive destruction of the specific heme-globin interactions. The functional analyses of O2 binding showed that the loose heme-globin contacts do not significantly affect the oxygen binding. On the other hand, the rearrangement of tetrapyrrole array and the non-planar deformation in porphyrin ring significantly affect the functional properties of myoglobin. These results, taken together, indicate that the essential factors to regulate the myoglobin function are hidden under the molecular shape of prosthetic group rather than in the nonbonded heme-globin contacts.
登录
查看更多内容
影响因子:
15
作者:
Hayashi, T;Dejima, H;Hisaeda, Y
通讯作者:
Hisaeda, Y
DOI:
10.1073/pnas.75.12.5755
发表时间:
1978-01-01
影响因子:
11.1
作者:
LAMAR, GN;BUDD, DL;LANGRY, KC
通讯作者:
LANGRY, KC
影响因子:
4.6
作者:
Neya, S;Imai, K;Funasaki, N
通讯作者:
Funasaki, N
影响因子:
15
作者:
KOTTALAM, J;CASE, DA
通讯作者:
CASE, DA
影响因子:
2.9
作者:
Monzani, E;Alzuet, G;Chillemi, F
通讯作者:
Chillemi, F