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5nbt

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Revision as of 12:01, 26 August 2020

Apo structure of p60N/p80C katanin

Structural highlights

5nbt is a 4 chain structure with sequence from Lk3 transgenic mice. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
Gene:	Katnb1 (LK3 transgenic mice), Katna1 (LK3 transgenic mice)
Activity:	Microtubule-severing ATPase, with EC number 3.6.4.3
Resources:	FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT

Function

[KTNB1_MOUSE] Participates in a complex which severs microtubules in an ATP-dependent manner. May act to target the enzymatic subunit of this complex to sites of action such as the centrosome. Microtubule severing may promote rapid reorganization of cellular microtubule arrays and the release of microtubules from the centrosome following nucleation. Microtubule release from the mitotic spindle poles may allow depolymerization of the microtubule end proximal to the spindle pole, leading to poleward microtubule flux and poleward motion of chromosome. Microtubule release within the cell body of neurons may be required for their transport into neuronal processes by microtubule-dependent motor proteins. This transport is required for axonal growth.[HAMAP-Rule:MF_03022] [KTNA1_MOUSE] Catalytic subunit of a complex which severs microtubules in an ATP-dependent manner. Microtubule severing may promote rapid reorganization of cellular microtubule arrays and the release of microtubules from the centrosome following nucleation. Microtubule release from the mitotic spindle poles may allow depolymerization of the microtubule end proximal to the spindle pole, leading to poleward microtubule flux and poleward motion of chromosome. Microtubule release within the cell body of neurons may be required for their transport into neuronal processes by microtubule-dependent motor proteins. This transport is required for axonal growth (By similarity).[HAMAP-Rule:MF_03023]

Publication Abstract from PubMed

ASPM (known as Asp in fly and ASPM-1 in worm) is a microcephaly-associated protein family that regulates spindle architecture, but the underlying mechanism is poorly understood. Here, we show that ASPM forms a complex with another protein linked to microcephaly, the microtubule-severing ATPase katanin. ASPM and katanin localize to spindle poles in a mutually dependent manner and regulate spindle flux. X-ray crystallography revealed that the heterodimer formed by the N- and C-terminal domains of the katanin subunits p60 and p80, respectively, binds conserved motifs in ASPM. Reconstitution experiments demonstrated that ASPM autonomously tracks growing microtubule minus ends and inhibits their growth, while katanin decorates and bends both ends of dynamic microtubules and potentiates the minus-end blocking activity of ASPM. ASPM also binds along microtubules, recruits katanin and promotes katanin-mediated severing of dynamic microtubules. We propose that the ASPM-katanin complex controls microtubule disassembly at spindle poles and that misregulation of this process can lead to microcephaly.

Microtubule minus-end regulation at spindle poles by an ASPM-katanin complex.,Jiang K, Rezabkova L, Hua S, Liu Q, Capitani G, Maarten Altelaar AF, Heck AJR, Kammerer RA, Steinmetz MO, Akhmanova A Nat Cell Biol. 2017 May;19(5):480-492. doi: 10.1038/ncb3511. Epub 2017 Apr 24. PMID:28436967^[1]

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

References

↑ Jiang K, Rezabkova L, Hua S, Liu Q, Capitani G, Maarten Altelaar AF, Heck AJR, Kammerer RA, Steinmetz MO, Akhmanova A. Microtubule minus-end regulation at spindle poles by an ASPM-katanin complex. Nat Cell Biol. 2017 May;19(5):480-492. doi: 10.1038/ncb3511. Epub 2017 Apr 24. PMID:28436967 doi:http://dx.doi.org/10.1038/ncb3511

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/5nbt"

@@ Line 1: / Line 1: @@
 ==Apo structure of p60N/p80C katanin==
-<StructureSection load='5nbt' size='340' side='right' caption='[[5nbt]], [[Resolution|resolution]] 2.40&Aring;' scene=''>
+<StructureSection load='5nbt' size='340' side='right'caption='[[5nbt]], [[Resolution|resolution]] 2.40&Aring;' scene=''>
 == Structural highlights ==
-<table><tr><td colspan='2'>[[5nbt]] is a 4 chain structure. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=5NBT OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=5NBT FirstGlance]. <br>
+<table><tr><td colspan='2'>[[5nbt]] is a 4 chain structure with sequence from [http://en.wikipedia.org/wiki/Lk3_transgenic_mice Lk3 transgenic mice]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=5NBT OCA]. For a <b>guided tour on the structure components</b> use [http://proteopedia.org/fgij/fg.htm?mol=5NBT FirstGlance]. <br>
-</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>
+</td></tr><tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">Katnb1 ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=10090 LK3 transgenic mice]), Katna1 ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=10090 LK3 transgenic mice])</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=5nbt FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=5nbt OCA], [http://pdbe.org/5nbt PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=5nbt RCSB], [http://www.ebi.ac.uk/pdbsum/5nbt PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=5nbt ProSAT]</span></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://proteopedia.org/fgij/fg.htm?mol=5nbt FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=5nbt OCA], [http://pdbe.org/5nbt PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=5nbt RCSB], [http://www.ebi.ac.uk/pdbsum/5nbt PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=5nbt ProSAT]</span></td></tr>
 </table>
 == Function ==
@@ Line 22: / Line 23: @@
 __TOC__
 </StructureSection>
+[[Category: Large Structures]]
+[[Category: Lk3 transgenic mice]]
 [[Category: Microtubule-severing ATPase]]
 [[Category: Akhmanova, A]]

5nbt

From Proteopedia

Revision as of 12:01, 26 August 2020

Apo structure of p60N/p80C katanin

Structural highlights

Function

Publication Abstract from PubMed

References

Contents

Proteopedia Page Contributors and Editors (what is this?)

Views

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