This old version of Proteopedia is provided for student assignments while the new version is undergoing repairs. Content and edits done in this old version of Proteopedia after March 1, 2026 will eventually be lost when it is retired in about June of 2026.

Apply for new accounts at the new Proteopedia. Your logins will work in both the old and new versions.

5wc0

From Proteopedia

(Difference between revisions)

Jump to: navigation, search

Revision as of 22:21, 10 April 2020

katanin hexamer in spiral conformation

5wc0, resolution 4.40Å

Structural highlights

5wc0 is a 6 chain structure with sequence from Caeel. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
Ligands:
Related:	5wcb, 5wc1
Gene:	mei-1, T01G9.5 (CAEEL)
Activity:	Microtubule-severing ATPase, with EC number 3.6.4.3
Experimental data:	Check to display Experimental Data
Resources:	FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT

Function

[KTNA1_CAEEL] Catalytic subunit of a complex which severs microtubules in an ATP-dependent manner. Microtubule severing may promote rapid reorganization of cellular microtubule arrays. Required specifically for meiotic spindle formation in the female germline; the presence of this protein is inimical to the formation of mitotic spindles (PubMed:8027178, PubMed:10809666, PubMed:12885567). In body wall muscles, regulates organization of myosin thick filaments (PubMed:22621901).[HAMAP-Rule:MF_03023]^[1] ^[2] ^[3] ^[4]

Publication Abstract from PubMed

Microtubule-severing enzymes katanin, spastin and fidgetin are AAA ATPases important for the biogenesis and maintenance of complex microtubule arrays in axons, spindles and cilia. Because of a lack of known 3D structures for these enzymes, their mechanism of action has remained poorly understood. Here we report the X-ray crystal structure of the monomeric AAA katanin module from Caenorhabditis elegans and cryo-EM reconstructions of the hexamer in two conformations. The structures reveal an unexpected asymmetric arrangement of the AAA domains mediated by structural elements unique to microtubule-severing enzymes and critical for their function. The reconstructions show that katanin cycles between open spiral and closed ring conformations, depending on the ATP occupancy of a gating protomer that tenses or relaxes interprotomer interfaces. Cycling of the hexamer between these conformations would provide the power stroke for microtubule severing.

Katanin spiral and ring structures shed light on power stroke for microtubule severing.,Zehr E, Szyk A, Piszczek G, Szczesna E, Zuo X, Roll-Mecak A Nat Struct Mol Biol. 2017 Aug 7. doi: 10.1038/nsmb.3448. PMID:28783150^[5]

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

References

↑ Srayko M, Buster DW, Bazirgan OA, McNally FJ, Mains PE. MEI-1/MEI-2 katanin-like microtubule severing activity is required for Caenorhabditis elegans meiosis. Genes Dev. 2000 May 1;14(9):1072-84. PMID:10809666
↑ Yang HY, McNally K, McNally FJ. MEI-1/katanin is required for translocation of the meiosis I spindle to the oocyte cortex in C elegans. Dev Biol. 2003 Aug 1;260(1):245-59. PMID:12885567
↑ Wilson KJ, Qadota H, Mains PE, Benian GM. UNC-89 (obscurin) binds to MEL-26, a BTB-domain protein, and affects the function of MEI-1 (katanin) in striated muscle of Caenorhabditis elegans. Mol Biol Cell. 2012 Jul;23(14):2623-34. doi: 10.1091/mbc.E12-01-0055. Epub 2012, May 23. PMID:22621901 doi:http://dx.doi.org/10.1091/mbc.E12-01-0055
↑ Clark-Maguire S, Mains PE. Localization of the mei-1 gene product of Caenorhaditis elegans, a meiotic-specific spindle component. J Cell Biol. 1994 Jul;126(1):199-209. PMID:8027178
↑ Zehr E, Szyk A, Piszczek G, Szczesna E, Zuo X, Roll-Mecak A. Katanin spiral and ring structures shed light on power stroke for microtubule severing. Nat Struct Mol Biol. 2017 Aug 7. doi: 10.1038/nsmb.3448. PMID:28783150 doi:http://dx.doi.org/10.1038/nsmb.3448

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/5wc0"

@@ Line 3: / Line 3: @@
 <SX load='5wc0' size='340' side='right' viewer='molstar' caption='[[5wc0]], [[Resolution|resolution]] 4.40&Aring;' scene=''>
 == Structural highlights ==
-<table><tr><td colspan='2'>[[5wc0]] is a 6 chain structure with sequence from [http://en.wikipedia.org/wiki/Caeel Caeel]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=5WC0 OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=5WC0 FirstGlance]. <br>
+<table><tr><td colspan='2'>[[5wc0]] is a 6 chain structure with sequence from [http://en.wikipedia.org/wiki/Caeel Caeel]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=5WC0 OCA]. For a <b>guided tour on the structure components</b> use [http://proteopedia.org/fgij/fg.htm?mol=5WC0 FirstGlance]. <br>
-</td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=ATP:ADENOSINE-5-TRIPHOSPHATE'>ATP</scene></td></tr>
+</td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=ATP:ADENOSINE-5-TRIPHOSPHATE'>ATP</scene></td></tr>
 <tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[5wcb|5wcb]], [[5wc1|5wc1]]</td></tr>
 <tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">mei-1, T01G9.5 ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=6239 CAEEL])</td></tr>
 <tr id='activity'><td class="sblockLbl"><b>Activity:</b></td><td class="sblockDat"><span class='plainlinks'>[http://en.wikipedia.org/wiki/Microtubule-severing_ATPase Microtubule-severing ATPase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=3.6.4.3 3.6.4.3] </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=5wc0 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=5wc0 OCA], [http://pdbe.org/5wc0 PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=5wc0 RCSB], [http://www.ebi.ac.uk/pdbsum/5wc0 PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=5wc0 ProSAT]</span></td></tr>
+<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://proteopedia.org/fgij/fg.htm?mol=5wc0 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=5wc0 OCA], [http://pdbe.org/5wc0 PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=5wc0 RCSB], [http://www.ebi.ac.uk/pdbsum/5wc0 PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=5wc0 ProSAT]</span></td></tr>
 </table>
 == Function ==

5wc0

From Proteopedia

Revision as of 22:21, 10 April 2020

katanin hexamer in spiral conformation

Structural highlights

Function

Publication Abstract from PubMed

References

Contents

Proteopedia Page Contributors and Editors (what is this?)

Views

Personal tools

Navigation

Search

Toolbox