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4o63

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Revision as of 18:19, 5 August 2016

Co-enzyme Induced Conformational Changes in Bovine Eye Glyceraldehyde 3-Phosphate Dehydrogenase

Structural highlights

4o63 is a 4 chain structure with sequence from Bos taurus. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
Ligands:
Related:	4o59
Resources:	FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT

Function

[G3P_BOVIN] Has both glyceraldehyde-3-phosphate dehydrogenase and nitrosylase activities, thereby playing a role in glycolysis and nuclear functions, respectively. Glyceraldehyde-3-phosphate dehydrogenase is a key enzyme in glycolysis that catalyzes the first step of the pathway by converting D-glyceraldehyde 3-phosphate (G3P) into 3-phospho-D-glyceroyl phosphate. Modulates the organization and assembly of the cytoskeleton. Facilitates the CHP1-dependent microtubule and membrane associations through its ability to stimulate the binding of CHP1 to microtubules. Also participates in nuclear events including transcription, RNA transport, DNA replication and apoptosis. Nuclear functions are probably due to the nitrosylase activity that mediates cysteine S-nitrosylation of nuclear target proteins such as SIRT1, HDAC2 and PRKDC. Component of the GAIT (gamma interferon-activated inhibitor of translation) complex which mediates interferon-gamma-induced transcript-selective translation inhibition in inflammation processes. Upon interferon-gamma treatment assembles into the GAIT complex which binds to stem loop-containing GAIT elements in the 3'-UTR of diverse inflammatory mRNAs (such as ceruplasmin) and suppresses their translation (By similarity).

Publication Abstract from PubMed

Glyceraldehyde-3-phosphate dehydrogenase (GAPDH) catalyzes the oxidative phosphorylation of D-glyceraldehyde 3-phosphate (G3P) into 1,3-diphosphoglycerate (BGP) in the presence of the NAD cofactor. GAPDH is an important drug target because of its central role in glycolysis, and non-glycolytic processes such as nuclear RNA transport, DNA replication/repair, membrane fusion and cellular apoptosis. Recent studies found that GAPDH participates in the development of diabetic retinopathy and its progression after the cessation of hyperglycemia. Here, we report two structures for native bovine photoreceptor GAPDH as a homotetramer with differing occupancy by NAD, bGAPDH(NAD)4 and bGAPDH(NAD)3 . The bGAPDH(NAD)4 was solved at 1.52 A, the highest resolution for GAPDH. Structural comparison of the bGAPDH(NAD)4 and bGAPDH(NAD)3 models revealed novel details of conformational changes induced by cofactor binding, including a loop region (residues 54 - 56). Structure analysis of bGAPDH confirmed the importance of Phe34 in NAD binding, and demonstrated that Phe34 was stabilized in the presence of NAD but displayed greater mobility in its absence. The oxidative state of the active site Cys149 residue is regulated by NAD binding, because this residue was found oxidized in the absence of dinucleotide. The distance between Cys149 and His176 decreased upon NAD binding and Cys149 remained in a reduced state when NAD was bound. These findings provide an important structural step for understanding the mechanism of GAPDH activity in vision and its pathological role in retinopathies.

High Resolution Crystal Structures of the Photoreceptor Glyceraldehyde 3-Phosphate Dehydrogenase (GAPDH) with Three and Four-bound NAD Molecules.,Baker BY, Shi W, Wang B, Palczewski K Protein Sci. 2014 Aug 30. doi: 10.1002/pro.2543. PMID:25176140^[1]

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

References

↑ Baker BY, Shi W, Wang B, Palczewski K. High Resolution Crystal Structures of the Photoreceptor Glyceraldehyde 3-Phosphate Dehydrogenase (GAPDH) with Three and Four-bound NAD Molecules. Protein Sci. 2014 Aug 30. doi: 10.1002/pro.2543. PMID:25176140 doi:http://dx.doi.org/10.1002/pro.2543

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

Proteopedia Page Contributors and Editors (what is this?)

OCA

Retrieved from "http://52.214.119.220/wiki/index.php/4o63"

@@ Line 1: / Line 1: @@
 ==Co-enzyme Induced Conformational Changes in Bovine Eye Glyceraldehyde 3-Phosphate Dehydrogenase==
 <StructureSection load='4o63' size='340' side='right' caption='[[4o63]], [[Resolution|resolution]] 1.93&Aring;' scene=''>
@@ Line 5: / Line 6: @@
 </td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=NAD:NICOTINAMIDE-ADENINE-DINUCLEOTIDE'>NAD</scene></td></tr>
 <tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[4o59|4o59]]</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=4o63 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=4o63 OCA], [http://www.rcsb.org/pdb/explore.do?structureId=4o63 RCSB], [http://www.ebi.ac.uk/pdbsum/4o63 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=4o63 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=4o63 OCA], [http://pdbe.org/4o63 PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=4o63 RCSB], [http://www.ebi.ac.uk/pdbsum/4o63 PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=4o63 ProSAT]</span></td></tr>
 </table>
 == Function ==
@@ Line 17: / Line 18: @@
 From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
 </div>
+<div class="pdbe-citations 4o63" style="background-color:#fffaf0;"></div>
 == References ==
 <references/>

4o63

From Proteopedia

Revision as of 18:19, 5 August 2016

Co-enzyme Induced Conformational Changes in Bovine Eye Glyceraldehyde 3-Phosphate Dehydrogenase

Structural highlights

Function

Publication Abstract from PubMed

References

Contents

Proteopedia Page Contributors and Editors (what is this?)

Views

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