Mechanistic insights into anchorage of the contractile ring from yeast to humans

Experimental Data Snapshot

  • Resolution: 2.80 Å
  • R-Value Free: 0.269 
  • R-Value Work: 0.235 
  • R-Value Observed: 0.237 

wwPDB Validation   3D Report Full Report

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Mechanistic insights into the anchorage of the contractile ring by anillin and mid1

Sun, L.Guan, R.Lee, I.J.Liu, Y.Chen, M.Wang, J.Wu, J.Q.Chen, Z.

(2015) Dev Cell 33: 413-426

  • DOI: https://doi.org/10.1016/j.devcel.2015.03.003
  • Primary Citation of Related Structures:  
    4XH3, 4XOH, 4XOI

  • PubMed Abstract: 

    Anillins and Mid1 are scaffold proteins that play key roles in anchorage of the contractile ring at the cell equator during cytokinesis in animals and fungi, respectively. Here, we report crystal structures and functional analysis of human anillin and S. pombe Mid1. The combined data show anillin contains a cryptic C2 domain and a Rho-binding domain. Together with the tethering PH domain, three membrane-associating elements synergistically bind to RhoA and phospholipids to anchor anillin at the cleavage furrow. Surprisingly, Mid1 also binds to the membrane through a cryptic C2 domain. Dimerization of Mid1 leads to high affinity and preference for PI(4,5)P2, which stably anchors Mid1 at the division plane, bypassing the requirement for Rho GTPase. These findings uncover the unexpected general machinery and the divergent regulatory logics for the anchorage of the contractile ring through the anillin/Mid1 family proteins from yeast to humans.

  • Organizational Affiliation

    MOE Key Laboratory of Protein Science, Tsinghua University, Beijing 100084, China; School of Life Science, Tsinghua University, Beijing 100084, China.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Division mal foutue 1 proteinA [auth C],
B [auth A],
C [auth B]
325Schizosaccharomyces pombe 972h-Mutation(s): 0 
Gene Names: mid1dmf1SPCC4B3.15
Find proteins for P78953 (Schizosaccharomyces pombe (strain 972 / ATCC 24843))
Explore P78953 
Go to UniProtKB:  P78953
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP78953
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 2.80 Å
  • R-Value Free: 0.269 
  • R-Value Work: 0.235 
  • R-Value Observed: 0.237 
  • Space Group: P 31 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 80.941α = 90
b = 80.941β = 90
c = 314.44γ = 120
Software Package:
Software NamePurpose
HKL-2000data reduction
HKL-2000data scaling

Structure Validation

View Full Validation Report

Entry History & Funding Information

Deposition Data

Funding OrganizationLocationGrant Number
National Natural Science Foundation of ChinaChina31270762
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)United StatesGM086546

Revision History  (Full details and data files)

  • Version 1.0: 2015-07-15
    Type: Initial release
  • Version 1.1: 2017-10-18
    Changes: Author supporting evidence, Derived calculations, Source and taxonomy, Structure summary
  • Version 1.2: 2022-03-23
    Changes: Author supporting evidence, Database references
  • Version 1.3: 2024-05-29
    Changes: Data collection