6udp: Difference between revisions

From Proteopedia
Jump to navigation Jump to search
← Older edit
No edit summary
No edit summary
 
Line 3: Line 3:
<StructureSection load='6udp' size='340' side='right'caption='[[6udp]], [[Resolution|resolution]] 2.95&Aring;' scene=''>
<StructureSection load='6udp' size='340' side='right'caption='[[6udp]], [[Resolution|resolution]] 2.95&Aring;' scene=''>
== Structural highlights ==
== Structural highlights ==
<table><tr><td colspan='2'>[[6udp]] is a 8 chain structure. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=6UDP OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=6UDP FirstGlance]. <br>
<table><tr><td colspan='2'>[[6udp]] is a 8 chain structure with sequence from [https://en.wikipedia.org/wiki/Homo_sapiens Homo sapiens]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=6UDP OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=6UDP FirstGlance]. <br>
</td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=IMP:INOSINIC+ACID'>IMP</scene></td></tr>
</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">Electron Microscopy, [[Resolution|Resolution]] 2.95&#8491;</td></tr>
<tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[6u8e|6u8e]], [[6u8n|6u8n]], [[6u8r|6u8r]], [[6u8s|6u8s]], [[6u9o|6u9o]], [[6ua2|6ua2]], [[6ua4|6ua4]], [[6ua5|6ua5]], [[6uaj|6uaj]], [[6uc2|6uc2]], [[6udo|6udo]]</td></tr>
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=IMP:INOSINIC+ACID'>IMP</scene></td></tr>
<tr id='activity'><td class="sblockLbl"><b>Activity:</b></td><td class="sblockDat"><span class='plainlinks'>[http://en.wikipedia.org/wiki/IMP_dehydrogenase IMP dehydrogenase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=1.1.1.205 1.1.1.205] </span></td></tr>
<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[https://proteopedia.org/fgij/fg.htm?mol=6udp FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=6udp OCA], [https://pdbe.org/6udp PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=6udp RCSB], [https://www.ebi.ac.uk/pdbsum/6udp PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=6udp ProSAT]</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=6udp FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=6udp OCA], [http://pdbe.org/6udp PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=6udp RCSB], [http://www.ebi.ac.uk/pdbsum/6udp PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=6udp ProSAT]</span></td></tr>
</table>
</table>
== Function ==
== Function ==
[[http://www.uniprot.org/uniprot/IMDH2_HUMAN IMDH2_HUMAN]] Catalyzes the conversion of inosine 5'-phosphate (IMP) to xanthosine 5'-phosphate (XMP), the first committed and rate-limiting step in the de novo synthesis of guanine nucleotides, and therefore plays an important role in the regulation of cell growth. Could also have a single-stranded nucleic acid-binding activity and could play a role in RNA and/or DNA metabolism. It may also have a role in the development of malignancy and the growth progression of some tumors.[HAMAP-Rule:MF_03156]  
[https://www.uniprot.org/uniprot/IMDH2_HUMAN IMDH2_HUMAN] Catalyzes the conversion of inosine 5'-phosphate (IMP) to xanthosine 5'-phosphate (XMP), the first committed and rate-limiting step in the de novo synthesis of guanine nucleotides, and therefore plays an important role in the regulation of cell growth. Could also have a single-stranded nucleic acid-binding activity and could play a role in RNA and/or DNA metabolism. It may also have a role in the development of malignancy and the growth progression of some tumors.[HAMAP-Rule:MF_03156]
<div style="background-color:#fffaf0;">
== Publication Abstract from PubMed ==
Inosine monophosphate dehydrogenase (IMPDH) mediates the first committed step in guanine nucleotide biosynthesis and plays important roles in cellular proliferation and the immune response. IMPDH reversibly polymerizes in cells and tissues in response to changes in metabolic demand. Self-assembly of metabolic enzymes is increasingly recognized as a general mechanism for regulating activity, typically by stabilizing specific conformations of an enzyme, but the regulatory role of IMPDH filaments has remained unclear. Here, we report a series of human IMPDH2 cryo-EM structures in both active and inactive conformations. The structures define the mechanism of filament assembly, and reveal how filament-dependent allosteric regulation of IMPDH2 makes the enzyme less sensitive to feedback inhibition, explaining why assembly occurs under physiological conditions that require expansion of guanine nucleotide pools. Tuning sensitivity to an allosteric inhibitor distinguishes IMPDH from other metabolic filaments, and highlights the diversity of regulatory outcomes that can emerge from self-assembly.


Cryo-EM structures demonstrate human IMPDH2 filament assembly tunes allosteric regulation.,Johnson MC, Kollman JM Elife. 2020 Jan 30;9. pii: 53243. doi: 10.7554/eLife.53243. PMID:31999252<ref>PMID:31999252</ref>
==See Also==
 
*[[Inosine monophosphate dehydrogenase 3D structures|Inosine monophosphate dehydrogenase 3D structures]]
From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
</div>
<div class="pdbe-citations 6udp" style="background-color:#fffaf0;"></div>
== References ==
<references/>
__TOC__
__TOC__
</StructureSection>
</StructureSection>
[[Category: IMP dehydrogenase]]
[[Category: Homo sapiens]]
[[Category: Large Structures]]
[[Category: Large Structures]]
[[Category: Johnson, M C]]
[[Category: Johnson MC]]
[[Category: Kollman, J M]]
[[Category: Kollman JM]]
[[Category: Adenine]]
[[Category: Allostery]]
[[Category: Biosynthetic protein]]
[[Category: Filament]]
[[Category: Guanine]]
[[Category: Metabolism]]

Latest revision as of 12:29, 20 March 2024

Human IMPDH2 treated with ATP, IMP, and 20 mM GTP. Filament assembly interface reconstruction.Human IMPDH2 treated with ATP, IMP, and 20 mM GTP. Filament assembly interface reconstruction.

Structural highlights

6udp is a 8 chain structure with sequence from Homo sapiens. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
Method:Electron Microscopy, Resolution 2.95Å
Ligands:
Resources:FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT

Function

IMDH2_HUMAN Catalyzes the conversion of inosine 5'-phosphate (IMP) to xanthosine 5'-phosphate (XMP), the first committed and rate-limiting step in the de novo synthesis of guanine nucleotides, and therefore plays an important role in the regulation of cell growth. Could also have a single-stranded nucleic acid-binding activity and could play a role in RNA and/or DNA metabolism. It may also have a role in the development of malignancy and the growth progression of some tumors.[HAMAP-Rule:MF_03156]

See Also

6udp, resolution 2.95Å

Drag the structure with the mouse to rotate

Proteopedia Page Contributors and Editors (what is this?)Proteopedia Page Contributors and Editors (what is this?)

OCA
Retrieved from "https://proteopedia.openfox.io/wiki/index.php?title=6udp&oldid=4106914"