Structural biology of the purine biosynthetic pathway.
Structural biology of the purine biosynthetic pathway.
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DOI:
10.1007/s00018-008-8295-8
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发表时间:
2008-11
影响因子:
8
通讯作者:
Ealick, S. E.
中科院分区:
文献类型:
--
作者:
Zhang, Y.;Morar, M.;Ealick, S. E.
Purine biosynthesis requires ten enzymatic transformations to generate inosine monophosphate. PurF, PurD, PurL, PurM, PurC, and PurB are common to all pathways, while PurN or PurT, PurK/PurE-I or PurE-II, PurH or PurP, and PurJ or PurO catalyze the same steps in different organisms. X-ray crystal structures are available for all 15 purine biosynthetic enzymes, including seven ATP-dependent enzymes, two amidotransferases and two tetrahydrofolate-dependent enzymes. Here we summarize the structures of the purine biosynthetic enzymes, discuss similarities and differences, and present arguments for pathway evolution. Four of the ATP-dependent enzymes belong to the ATP-grasp superfamily and two to the PurM superfamily. The amidotransferases are unrelated with one utilizing an NTN-glutaminase and the other utilizing a triad glutaminase. Likewise the tetrahydrofolate-dependent enzymes are unrelated. Ancestral proteins may have included a broad specificity enzyme instead of PurD, PurT, PurK, PurC, and PurP, and a separate enzyme instead of PurM and PurL.
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影响因子:
4.8
作者:
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通讯作者:
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影响因子:
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作者:
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DOI:
10.1107/s0907444904019158
发表时间:
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2.2
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DOI:
10.1073/pnas.87.8.3097
发表时间:
1990-04-01
影响因子:
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作者:
CHEN, ZD;DIXON, JE;ZALKIN, H
通讯作者:
ZALKIN, H