We apologize for Proteopedia being slow to respond. For the past two years, a new implementation of Proteopedia has been being built. Soon, it will replace this 18-year old system. All existing content will be moved to the new system at a date that will be announced here.

2hi7

From Proteopedia

(Difference between revisions)

Jump to: navigation, search

Revision as of 10:10, 1 April 2020

Crystal structure of DsbA-DsbB-ubiquinone complex

Structural highlights

2hi7 is a 2 chain structure with sequence from "bacillus_coli"_migula_1895 "bacillus coli" migula 1895. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
Ligands:	,
Resources:	FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT

Function

[DSBA_ECOLI] Required for disulfide bond formation in some periplasmic proteins such as PhoA or OmpA. Acts by transferring its disulfide bond to other proteins and is reduced in the process. DsbA is reoxidized by DsbB. Required for pilus biogenesis. PhoP-regulated transcription is redox-sensitive, being activated when the periplasm becomes more reducing (deletion of dsbA/dsbB, treatment with dithiothreitol). MgrB acts between DsbA/DsbB and PhoP/PhoQ in this pathway.^[1] ^[2] [DSBB_ECOLI] Required for disulfide bond formation in some periplasmic proteins such as PhoA or OmpA. Acts by oxidizing the DsbA protein.^[3] ^[4]

Evolutionary Conservation

Check, as determined by ConSurfDB. You may read the explanation of the method and the full data available from ConSurf.

Publication Abstract from PubMed

Oxidation of cysteine pairs to disulfide requires cellular factors present in the bacterial periplasmic space. DsbB is an E. coli membrane protein that oxidizes DsbA, a periplasmic dithiol oxidase. To gain insight into disulfide bond formation, we determined the crystal structure of the DsbB-DsbA complex at 3.7 A resolution. The structure of DsbB revealed four transmembrane helices and one short horizontal helix juxtaposed with Cys130 in the mobile periplasmic loop. Whereas DsbB in the resting state contains a Cys104-Cys130 disulfide, Cys104 in the binary complex is engaged in the intermolecular disulfide bond and captured by the hydrophobic groove of DsbA, resulting in separation from Cys130. This cysteine relocation prevents the backward resolution of the complex and allows Cys130 to approach and activate the disulfide-generating reaction center composed of Cys41, Cys44, Arg48, and ubiquinone. We propose that DsbB is converted by its specific substrate, DsbA, to a superoxidizing enzyme, capable of oxidizing this extremely oxidizing oxidase.

Crystal structure of the DsbB-DsbA complex reveals a mechanism of disulfide bond generation.,Inaba K, Murakami S, Suzuki M, Nakagawa A, Yamashita E, Okada K, Ito K Cell. 2006 Nov 17;127(4):789-801. PMID:17110337^[5]

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

References

↑ Akiyama Y, Kamitani S, Kusukawa N, Ito K. In vitro catalysis of oxidative folding of disulfide-bonded proteins by the Escherichia coli dsbA (ppfA) gene product. J Biol Chem. 1992 Nov 5;267(31):22440-5. PMID:1429594
↑ Lippa AM, Goulian M. Perturbation of the oxidizing environment of the periplasm stimulates the PhoQ/PhoP system in Escherichia coli. J Bacteriol. 2012 Mar;194(6):1457-63. doi: 10.1128/JB.06055-11. Epub 2012 Jan 20. PMID:22267510 doi:http://dx.doi.org/10.1128/JB.06055-11
↑ Bardwell JC, Lee JO, Jander G, Martin N, Belin D, Beckwith J. A pathway for disulfide bond formation in vivo. Proc Natl Acad Sci U S A. 1993 Feb 1;90(3):1038-42. PMID:8430071
↑ Missiakas D, Georgopoulos C, Raina S. Identification and characterization of the Escherichia coli gene dsbB, whose product is involved in the formation of disulfide bonds in vivo. Proc Natl Acad Sci U S A. 1993 Aug 1;90(15):7084-8. PMID:7688471
↑ Inaba K, Murakami S, Suzuki M, Nakagawa A, Yamashita E, Okada K, Ito K. Crystal structure of the DsbB-DsbA complex reveals a mechanism of disulfide bond generation. Cell. 2006 Nov 17;127(4):789-801. PMID:17110337 doi:10.1016/j.cell.2006.10.034

1 Structural highlights
2 Function
3 Evolutionary Conservation
4 Publication Abstract from PubMed
5 See Also
6 References

Proteopedia Page Contributors and Editors (what is this?)

OCA

Retrieved from "http://52.214.119.220/wiki/index.php/2hi7"

@@ Line 1: / Line 1: @@
 ==Crystal structure of DsbA-DsbB-ubiquinone complex==
-<StructureSection load='2hi7' size='340' side='right' caption='[[2hi7]], [[Resolution|resolution]] 3.70&Aring;' scene=''>
+<StructureSection load='2hi7' size='340' side='right'caption='[[2hi7]], [[Resolution|resolution]] 3.70&Aring;' scene=''>
 == Structural highlights ==
 <table><tr><td colspan='2'>[[2hi7]] is a 2 chain structure with sequence from [http://en.wikipedia.org/wiki/"bacillus_coli"_migula_1895 "bacillus coli" migula 1895]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2HI7 OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=2HI7 FirstGlance]. <br>
@@ Line 31: / Line 31: @@
 ==See Also==
 *[[Protein disulfide oxidoreductase|Protein disulfide oxidoreductase]]
+*[[Thiol:disulfide interchange protein 3D structures|Thiol:disulfide interchange protein 3D structures]]
 == References ==
 <references/>
@@ Line 36: / Line 37: @@
 </StructureSection>
 [[Category: Bacillus coli migula 1895]]
+[[Category: Large Structures]]
 [[Category: Inaba, K]]
 [[Category: Ito, K]]

2hi7

From Proteopedia

Revision as of 10:10, 1 April 2020

Crystal structure of DsbA-DsbB-ubiquinone complex

Structural highlights

Function

Evolutionary Conservation

Publication Abstract from PubMed

See Also

References

Contents

Proteopedia Page Contributors and Editors (what is this?)

Views

Personal tools

Navigation

Search

Toolbox