Catalytic site conformations in human PNP by 19F-NMR and crystallography.
Catalytic site conformations in human PNP by 19F-NMR and crystallography.
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通过 19F-NMR 和晶体学测定人 PNP 中的催化位点构象。
DOI:
10.1016/j.chembiol.2013.01.009
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发表时间:
2013
影响因子:
--
通讯作者:
Schramm,VernL
中科院分区:
文献类型:
--
作者:
Suarez,Javier;Haapalainen,AnttiM;Cahill,SeanM;Ho,Meng-Chiao;Yan,Funing;Almo,StevenC;Schramm,VernL
Purine nucleoside phosphorylase (PNP) is a target for leukemia, gout, and autoimmune disorders. Dynamic motion of catalytic site loops has been implicated in catalysis, but experimental evidence was lacking. We replaced catalytic site groups His257 or His64 with 6-fluoro-tryptophan (6FW) as site-specific NMR probes. Conformational adjustments in the 6FW-His257-helical and His64-6FW-loop regions were characterized in PNP phosphate-bound enzyme and in complexes with catalytic site ligands, including transition state analogs. Chemical shift and line-shape changes associated with these complexes revealed dynamic coexistence of several conformational states in these regions in phosphate-bound enzyme and altered or single conformations in other complexes. These conformations were also characterized by X-ray crystallography. Specific19F-Trp labels and X-ray crystallography provide multidimensional characterization of conformational states for free, catalytic, and inhibited complexes of human PNP.
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影响因子:
3.4
作者:
Saen-Oon, Suwipa;Ghanem, Mahmoud;Schwartz, Steven D.
通讯作者:
Schwartz, Steven D.
DOI:
10.1097/iae.0000000000001602
发表时间:
2017
期刊:
Retina (Philadelphia, Pa.)
影响因子:
--
作者:
Todorich,Bozho;Thanos,Aristomenis;Yonekawa,Yoshihiro;Thomas,BenjaminJ;Faia,LisaJ;Chang,Emmanuel;Shulman,Julia;Olsen,KarlR;Blair,MichaelP;Shapiro,MichaelP;Ferrone,Philip;Vajzovic,Lejla;Toth,CynthiaA;Lee,ThomasC;Robinson,
通讯作者:
Robinson,
影响因子:
2.9
作者:
Rinaldo-Matthis,Agnes;Wing,Corin;Ghanem,Mahmoud;Deng,Hua;Wu,Peng;Gupta,Arti;Tyler,PeterC;Evans,GaryB;Furneaux,RichardH;Almo,StevenC;Wang,ChingC;Schramm,VernL
通讯作者:
Schramm,VernL
影响因子:
--
作者:
J. Stoeckler;R. Agarwal;K. Agarwal;R. Parks
通讯作者:
R. Parks
影响因子:
5.6
作者:
Koellner, G;Luic, M;Bzowska, A
通讯作者:
Bzowska, A