7SQK

Cryo-EM structure of the human augmin complex


Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 8.00 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

wwPDB Validation   3D Report Full Report


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Literature

Molecular architecture of the augmin complex.

Gabel, C.A.Li, Z.DeMarco, A.G.Zhang, Z.Yang, J.Hall, M.C.Barford, D.Chang, L.

(2022) Nat Commun 13: 5449-5449

  • DOI: 10.1038/s41467-022-33227-7
  • Primary Citation of Related Structures:  
    7SQK

  • PubMed Abstract: 
  • Accurate segregation of chromosomes during mitosis depends on the correct assembly of the mitotic spindle, a bipolar structure composed mainly of microtubules. The augmin complex, or homologous to augmin subunits (HAUS) complex, is an eight-subunit protein complex required for building robust mitotic spindles in metazoa ...

    Accurate segregation of chromosomes during mitosis depends on the correct assembly of the mitotic spindle, a bipolar structure composed mainly of microtubules. The augmin complex, or homologous to augmin subunits (HAUS) complex, is an eight-subunit protein complex required for building robust mitotic spindles in metazoa. Augmin increases microtubule density within the spindle by recruiting the γ-tubulin ring complex (γ-TuRC) to pre-existing microtubules and nucleating branching microtubules. Here, we elucidate the molecular architecture of augmin by single particle cryo-electron microscopy (cryo-EM), computational methods, and crosslinking mass spectrometry (CLMS). Augmin's highly flexible structure contains a V-shaped head and a filamentous tail, with the head existing in either extended or contracted conformational states. Our work highlights how cryo-EM, complemented by computational advances and CLMS, can elucidate the structure of a challenging protein complex and provides insights into the function of augmin in mediating microtubule branching nucleation.


    Organizational Affiliation

    Purdue University Center for Cancer Research, Purdue University, West Lafayette, IN, 47907, USA. lchang18@purdue.edu.



Macromolecules
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Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
HAUS augmin-like complex subunit 1A278Homo sapiensMutation(s): 0 
Gene Names: HAUS1CCDC5HEIC
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UniProt GroupQ96CS2
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Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
HAUS augmin-like complex subunit 2B284Homo sapiensMutation(s): 0 
Gene Names: HAUS2C15orf25CEP27
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Entity ID: 3
MoleculeChainsSequence LengthOrganismDetailsImage
HAUS augmin-like complex subunit 3C603Homo sapiensMutation(s): 0 
Gene Names: HAUS3C4orf15
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Entity ID: 4
MoleculeChainsSequence LengthOrganismDetailsImage
Isoform 4 of HAUS augmin-like complex subunit 4D318Homo sapiensMutation(s): 0 
Gene Names: HAUS4C14orf94
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Entity ID: 5
MoleculeChainsSequence LengthOrganismDetailsImage
HAUS augmin-like complex subunit 5E633Homo sapiensMutation(s): 0 
Gene Names: HAUS5KIAA0841
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Entity ID: 6
MoleculeChainsSequence LengthOrganismDetailsImage
HAUS augmin-like complex subunit 6F432Homo sapiensMutation(s): 0 
Gene Names: HAUS6DGT6FAM29AKIAA1574
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Entity ID: 7
MoleculeChainsSequence LengthOrganismDetailsImage
HAUS augmin-like complex subunit 7G368Homo sapiensMutation(s): 0 
Gene Names: HAUS7UCHL5IPUIP1
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Entity ID: 8
MoleculeChainsSequence LengthOrganismDetailsImage
HAUS augmin-like complex subunit 8H410Homo sapiensMutation(s): 0 
Gene Names: HAUS8HICE1
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Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 8.00 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

Structure Validation

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Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
Not funded--

Revision History  (Full details and data files)

  • Version 1.0: 2022-09-21
    Type: Initial release
  • Version 1.1: 2022-10-05
    Changes: Database references