Structural insights into the mycobacteria transcription initiation complex from analysis of X-ray crystal structures.
Structural insights into the mycobacteria transcription initiation complex from analysis of X-ray crystal structures.
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DOI:
10.1038/ncomms16072
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发表时间:
2017-07-13
影响因子:
16.6
通讯作者:
Campbell EA
中科院分区:
文献类型:
--
作者:
Hubin EA;Lilic M;Darst SA;Campbell EA
The mycobacteria RNA polymerase (RNAP) is a target for antimicrobials against tuberculosis, motivating structure/function studies. Here we report a 3.2 Å-resolution crystal structure of a Mycobacterium smegmatis (Msm) open promoter complex (RPo), along with structural analysis of the Msm RPo and a previously reported 2.76 Å-resolution crystal structure of an Msm transcription initiation complex with a promoter DNA fragment. We observe the interaction of the Msm RNAP α-subunit C-terminal domain (αCTD) with DNA, and we provide evidence that the αCTD may play a role in Mtb transcription regulation. Our results reveal the structure of an Actinobacteria-unique insert of the RNAP β′ subunit. Finally, our analysis reveals the disposition of the N-terminal segment of Msm σA, which may comprise an intrinsically disordered protein domain unique to mycobacteria. The clade-specific features of the mycobacteria RNAP provide clues to the profound instability of mycobacteria RPo compared with E. coli. Understanding of the mycobacterial transcription system is useful to the development of therapeutics against tuberculosis infection. Here the authors present the crystal structure of a complete M. smegmatis RNA polymerase open promoter complex that reveals unique features of the mycobacterial polymerase.
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影响因子:
14.9
作者:
Davis E;Chen J;Leon K;Darst SA;Campbell EA
通讯作者:
Campbell EA
影响因子:
64.5
作者:
Feklistov A;Darst SA
通讯作者:
Darst SA
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
影响因子:
16
作者:
Feklistov, Andrey;Barinova, Nataliya;Kulbachinskiy, Andrey
通讯作者:
Kulbachinskiy, Andrey
影响因子:
6.4
作者:
Czyz A;Mooney RA;Iaconi A;Landick R
通讯作者:
Landick R