Dimerization Determines Substrate Specificity of a Bacterial Prenyltransferase
Dimerization Determines Substrate Specificity of a Bacterial Prenyltransferase
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二聚化决定细菌异戊二烯基转移酶的底物特异性
DOI:
10.1002/cbic.201200127
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发表时间:
2012
期刊:
影响因子:
3.2
通讯作者:
Babinger
中科院分区:
文献类型:
--
作者:
Peterhoff;Zellner;Guldan;Sterner;Babinger
We have identified the native dimer interface of heptaprenylglyceryl phosphate synthase PcrB from the bacteriumBacillus subtilisand analyzed the significance of oligomer formation for stability and catalytic activity. Computational methods predicted two different surface regions of the PcrB protomer that could be responsible for dimer formation. These bona fide interfaces were assessed both in silico and experimentally by the introduction of amino acid substitutions that led to monomerization, and by incorporation of an unnatural amino acid to allow cross‐linking of the two protomers. The results showed that, in contrast to previous assumptions, PcrB uses the same interface for dimerization as the homologous geranylgeranylglyceryl phosphate synthase from Archaea. Thermal unfolding demonstrated that the monomeric proteins are only slightly less stable than wild‐type PcrB. However, activity assays showed that monomerization limits the length of accepted polyprenyl pyrophosphates to three isoprene units, whereas the native PcrB substrate contains seven isoprene entities. We provide a plausible hypothesis as to how dimerization determines substrate specificity of PcrB.
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影响因子:
15
作者:
Doud EH;Perlstein DL;Wolpert M;Cane DE;Walker S
通讯作者:
Walker S
影响因子:
--
作者:
通讯作者:
--
影响因子:
16.6
作者:
Guldan, Harald;Matysik, Frank-Michael;Babinger, Patrick
通讯作者:
Babinger, Patrick
影响因子:
2.9
作者:
Badger, J;Sauder, JM;Harris, TJR
通讯作者:
Harris, TJR
影响因子:
3.5
作者:
HO, SN;HUNT, HD;PEASE, LR
通讯作者:
PEASE, LR