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1e20

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Revision as of 05:20, 10 September 2015

THE FMN BINDING PROTEIN ATHAL3

Structural highlights

1e20 is a 1 chain structure with sequence from Arath. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
Ligands:	, ,
Resources:	FirstGlance, OCA, PDBe, RCSB, PDBsum

Function

[HAL3A_ARATH] Involved in plant growth and salt and osmotic tolerance. Catalyzes the decarboxylation of 4'-phosphopantothenoylcysteine to 4'-phosphopantetheine, a key step in coenzyme A biosynthesis. The enzyme is also able to decarboxylate pantothenoylcysteine to pantothenoylcysteamine.^[1] ^[2]

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

BACKGROUND: The Arabidopsis thaliana HAL3 gene product encodes for an FMN-binding protein (AtHal3) that is related to plant growth and salt and osmotic tolerance. AtHal3 shows sequence homology to ScHal3, a regulatory subunit of the Saccharomyces cerevisae serine/threonine phosphatase PPz1. It has been proposed that AtHal3 and ScHal3 have similar roles in cellular physiology, as Arabidopsis transgenic plants that overexpress AtHal3 and yeast cells that overexpress ScHal3 display similar phenotypes of improved salt tolerance. The enzymatic activity of AtHal3 has not been investigated. However, the AtHal3 sequence is homologous to that of EpiD, a flavoprotein from Staphylococcus epidermidis that recognizes a peptidic substrate and subsequently catalyzes the alpha, beta-dehydrogenation of its C-terminal cysteine residue. RESULTS: The X-ray structure of AtHal3 at 2 A resolution reveals that the biological unit is a trimer. Each protomer adopts an alpha/beta Rossmann fold consisting of a six-stranded parallel beta sheet flanked by two layers of alpha helices. The FMN-binding site of AtHal3 contains all the structural requirements of the flavoenzymes that catalyze dehydrogenation reactions. Comparison of the amino acid sequences of AtHal3, ScHal3 and EpiD reveals that a significant number of residues involved in trimer formation, the active site, and FMN binding are conserved. This observation suggests that ScHal3 and EpiD might also be trimers, having a similar structure and function to AtHal3. CONCLUSIONS: Structural comparisons of AtHal3 with other FMN-binding proteins show that AtHal3 defines a new subgroup of this protein family that is involved in signal transduction. Analysis of the structure of AtHal3 indicates that this protein is designed to interact with another cellular component and to subsequently catalyze the alpha,beta-dehydrogenation of a peptidyl cysteine. Structural data from AtHal3, together with physiological and biochemical information from ScHal3 and EpiD, allow us to propose a model for the recognition and regulation of AtHal3/ScHal3 cellular partners.

The X-ray structure of the FMN-binding protein AtHal3 provides the structural basis for the activity of a regulatory subunit involved in signal transduction.,Albert A, Martinez-Ripoll M, Espinosa-Ruiz A, Yenush L, Culianez-Macia FA, Serrano R Structure. 2000 Sep 15;8(9):961-9. PMID:10986463^[3]

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

References

↑ Kupke T, Hernandez-Acosta P, Culianez-Macia FA. 4'-phosphopantetheine and coenzyme A biosynthesis in plants. J Biol Chem. 2003 Oct 3;278(40):38229-37. Epub 2003 Jul 14. PMID:12860978 doi:http://dx.doi.org/10.1074/jbc.M306321200
↑ Rubio S, Larson TR, Gonzalez-Guzman M, Alejandro S, Graham IA, Serrano R, Rodriguez PL. An Arabidopsis mutant impaired in coenzyme A biosynthesis is sugar dependent for seedling establishment. Plant Physiol. 2006 Mar;140(3):830-43. Epub 2006 Jan 13. PMID:16415216 doi:http://dx.doi.org/10.1104/pp.105.072066
↑ Albert A, Martinez-Ripoll M, Espinosa-Ruiz A, Yenush L, Culianez-Macia FA, Serrano R. The X-ray structure of the FMN-binding protein AtHal3 provides the structural basis for the activity of a regulatory subunit involved in signal transduction. Structure. 2000 Sep 15;8(9):961-9. PMID:10986463

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

Proteopedia Page Contributors and Editors (what is this?)

OCA

Retrieved from "http://52.214.119.220/wiki/index.php/1e20"

@@ Line 2: / Line 2: @@
 <StructureSection load='1e20' size='340' side='right' caption='[[1e20]], [[Resolution|resolution]] 2.02&Aring;' scene=''>
 == Structural highlights ==
-<table><tr><td colspan='2'>[[1e20]] is a 1 chain structure with sequence from [http://en.wikipedia.org/wiki/Arabidopsis_thaliana Arabidopsis thaliana]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1E20 OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1E20 FirstGlance]. <br>
+<table><tr><td colspan='2'>[[1e20]] is a 1 chain structure with sequence from [http://en.wikipedia.org/wiki/Arath Arath]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1E20 OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1E20 FirstGlance]. <br>
 </td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=BME:BETA-MERCAPTOETHANOL'>BME</scene>, <scene name='pdbligand=FMN:FLAVIN+MONONUCLEOTIDE'>FMN</scene>, <scene name='pdbligand=NI:NICKEL+(II)+ION'>NI</scene></td></tr>
-<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1e20 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1e20 OCA], [http://www.rcsb.org/pdb/explore.do?structureId=1e20 RCSB], [http://www.ebi.ac.uk/pdbsum/1e20 PDBsum]</span></td></tr>
+<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1e20 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1e20 OCA], [http://pdbe.org/1e20 PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=1e20 RCSB], [http://www.ebi.ac.uk/pdbsum/1e20 PDBsum]</span></td></tr>
 </table>
 == Function ==
@@ Line 26: / Line 26: @@
 From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
 </div>
+<div class="pdbe-citations 1e20" style="background-color:#fffaf0;"></div>
 == References ==
 <references/>
 __TOC__
 </StructureSection>
-[[Category: Arabidopsis thaliana]]
+[[Category: Arath]]
 [[Category: Albert, A]]
 [[Category: Culianez-Macia, F A]]

1e20

From Proteopedia

Revision as of 05:20, 10 September 2015

THE FMN BINDING PROTEIN ATHAL3

Structural highlights

Function

Evolutionary Conservation

Publication Abstract from PubMed

References

Contents

Proteopedia Page Contributors and Editors (what is this?)

Views

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