8V2R | pdb_00008v2r

CHMP1B/IST1 ssDNA bound copolymer" to match the formatting of the other associated entries (8V2S & 8V2Q)

• PDB DOI: https://doi.org/10.2210/pdb8V2R/pdb
• EM Map EMD-42931: EMDB EMDataResource

• Classification: DNA BINDING PROTEIN
• Organism(s): Homo sapiens
• Expression System: Escherichia coli BL21(DE3)
• Mutation(s): Yes 


• Deposited: 2023-11-23 Released: 2024-11-27 
• Deposition Author(s): Talledge, N., Laughlin, T.G., Alian, A.
• Funding Organization(s): National Institutes of Health/Office of the Director, National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS), Howard Hughes Medical Institute (HHMI), Chan Zuckerberg Initiative

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Experimental Data Snapshot

• Method: ELECTRON MICROSCOPY
• Resolution: 3.01 Å
• Aggregation State: FILAMENT 
• Reconstruction Method: HELICAL 

Starting Models: experimental

Literature

ESCRT-III Assembles Around Mis-segregated DNA to Engage NoCut

Talledge, N., Glover, J., McCullough, J., Alian, A., Sadler, J.B.A., Dempsey, N., Laughlin, T.G., Nguyen, H.C., Wenzel, D., Lalonde, M.S., Ventimiglia, L.N., LaJoie, D., Iwasa, J., Starling, T., Padilla-Parra, S., Ullman, K.S., Frost, A., Sundquist, W.I., Martin-Serrano, J.

(2026) Nat Struct Mol Biol 

• DOI: https://doi.org/10.1038/s41594-026-01841-4

Biological Assembly 1  

Global Symmetry: Helical - H  (Explore in 3D)
Global Stoichiometry: Hetero 192-mer - A96B96 

Biological assembly 1 assigned by authors.

Biological Assembly Evidence: electron microscopy

Macromolecule Content 

• Total Structure Weight: 61.9 kDa 
• Atom Count: 2,916 
• Modeled Residue Count: 368 
• Deposited Residue Count: 563 
• Unique protein chains: 2

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Charged multivesicular body protein 1b	A	199	Homo sapiens	Mutation(s): 1  Gene Names: CHMP1B, C18orf2
UniProt & NIH Common Fund Data Resources
Find proteins for Q7LBR1 (Homo sapiens) Explore Q7LBR1  Go to UniProtKB:  Q7LBR1
PHAROS:  Q7LBR1 GTEx:  ENSG00000255112

Entity ID: 2
Molecule	Chains	Sequence Length	Organism	Details	Image
IST1 homolog	B	364	Homo sapiens	Mutation(s): 0  Gene Names: IST1, KIAA0174
UniProt & NIH Common Fund Data Resources
Find proteins for P53990 (Homo sapiens) Explore P53990  Go to UniProtKB:  P53990
PHAROS:  P53990 GTEx:  ENSG00000182149

Experimental Data & Validation

Experimental Data

• Method: ELECTRON MICROSCOPY
• Resolution: 3.01 Å
• Aggregation State: FILAMENT 
• Reconstruction Method: HELICAL 

EM Software:

Task	Software Package	Version
RECONSTRUCTION	cryoSPARC	4.2.1
MODEL REFINEMENT	ISOLDE	1.6.0

Structure Validation

Entry History 

& Funding Information

Deposition Data

• Released Date: 2024-11-27 
Deposition Author(s): Talledge, N., Laughlin, T.G., Alian, A.

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Funding Organization	Location	Grant Number
National Institutes of Health/Office of the Director	United States	S10OD020054
National Institutes of Health/Office of the Director	United States	1S10OD021741
National Institutes of Health/Office of the Director	United States	1S10OD021596-01
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)	United States	1DP2GM110772-01
Howard Hughes Medical Institute (HHMI)	United States	--
Chan Zuckerberg Initiative	United States	--

Revision History  

• Version 1.0: 2024-11-27
  Type: Initial release
  
• Version 1.1: 2026-07-15
  Changes: Data collection, Database references, Structure summary