Reconstitution of ThiC in thiamine pyrimidine biosynthesis expands the radical SAM superfamily.
Reconstitution of ThiC in thiamine pyrimidine biosynthesis expands the radical SAM superfamily.
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DOI:
10.1038/nchembio.121
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发表时间:
2008-12
影响因子:
14.8
通讯作者:
Ealick, Steven E.
中科院分区:
文献类型:
--
作者:
Chatterjee, Abhishek;Li, Yue;Zhang, Yang;Grove, Tyler L.;Lee, Michael;Krebs, Carsten;Booker, Squire J.;Begley, Tadhg P.;Ealick, Steven E.
4-Amino-5-hydroxymethyl-2-methylpyrimidine phosphate (HMP-P) synthase catalyzes a complex rearrangement of 5-aminoimidazole ribonucleotide (AIR) to form HMP-P, the pyrimidine moiety of thiamin phosphate. The three-dimensional structures of HMP-P synthase and its complexes with the product HMP-P and a substrate analog imidazole ribotide were determined. The structure of HMP-P synthase reveals a homodimer in which each protomer comprises three domains: an N-terminal domain with a novel fold, a central (βα)8 barrel and a disordered C-terminal domain that contains a conserved CX2CX4C motif, suggestive of a [4Fe-4S] cluster. Biochemical studies have confirmed that HMP-P synthase is iron sulfur cluster dependent, that it is a novel member of the radical SAM superfamily and that HMP-P and 5′-deoxyadenosine are products of the reaction. Mössbauer and EPR spectroscopy confirm the presence of one [4Fe-4S] cluster. Structural comparisons reveal that HMP-P synthase is homologous to a group of adenosylcobalamin radical enzymes. This similarity supports an evolutionary relationship between these two superfamilies.
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影响因子:
5.8
作者:
Gouet, P;Courcelle, E;Métoz, F
通讯作者:
Métoz, F
影响因子:
2.8
作者:
Dougherty, Michael J.;Downs, Diana M.
通讯作者:
Downs, Diana M.
DOI:
10.1107/s0907444904019158
发表时间:
2004-12-01
影响因子:
2.2
作者:
Emsley, P;Cowtan, K
通讯作者:
Cowtan, K
DOI:
10.1107/s0907444998003254
发表时间:
1998-09-01
期刊:
ACTA CRYSTALLOGRAPHICA SECTION D-BIOLOGICAL CRYSTALLOGRAPHY
影响因子:
--
作者:
Brunger, AT;Adams, PD;Warren, GL
通讯作者:
Warren, GL
影响因子:
15
作者:
Chatterjee, Abhishek;Jurgenson, Christopher T.;Begley, Tadhg P.
通讯作者:
Begley, Tadhg P.