9NCJ | pdb_00009ncj

Coiled-coil bundlemer nanotube, R3K (15 proto-filaments)

• PDB DOI: https://doi.org/10.2210/pdb9NCJ/pdb
• EM Map EMD-49258: EMDB EMDataResource

• Classification: PROTEIN FIBRIL
• Organism(s): synthetic construct
• Mutation(s): No 


• Deposited: 2025-02-16 Released: 2026-02-18 
• Deposition Author(s): Das, A., Conticello, V.
• Funding Organization(s): National Science Foundation (NSF, United States)

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Experimental Data Snapshot

• Method: ELECTRON MICROSCOPY
• Resolution: 3.93 Å
• Aggregation State: FILAMENT 
• Reconstruction Method: HELICAL 

Literature

Coiled-coil bundlemer nanotube, R3K (15 proto-filaments)

Das, A., Conticello, V.

To be published.

Biological Assembly 1  

Global Symmetry: Cyclic - C2  (Explore in 3D)
Global Stoichiometry: Homo 144-mer - A144 

Biological assembly 1 assigned by authors.

Biological Assembly Evidence: electron microscopy

Macromolecule Content 

• Total Structure Weight: 452.54 kDa 
• Atom Count: 31,392 
• Modeled Residue Count: 4,320 
• Deposited Residue Count: 4,320 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
R3K nanotube	A, AA [auth o], AB [auth BA], AC [auth YA], AD [auth N], AE [auth HB], B [auth S], BA [auth p], BB [auth CA], BC [auth ZA], BD [auth vA], BE [auth IB], C [auth T], CA [auth q], CB [auth DA], CC [auth K], CD [auth wA], CE [auth JB], D [auth U], DA [auth r], DB [auth EA], DC [auth aA], DD [auth xA], DE [auth KB], E [auth V], EA [auth s], EB [auth H], EC [auth bA], ED [auth yA], EE [auth LB], F [auth W], FA [auth t], FB [auth FA], FC [auth cA], FD [auth zA], FE [auth MB], G [auth X], GA [auth E], GB [auth GA], GC [auth dA], GD [auth 0A], GE [auth R], H [auth Y], HA [auth u], HB [auth HA], HC [auth eA], HD [auth 1A], HE [auth NB], I [auth B], IA [auth v], IB [auth IA], IC [auth fA], ID [auth O], IE [auth OB], J [auth Z], JA [auth w], JB [auth JA], JC [auth gA], JD [auth 2A], JE [auth PB], K [auth a], KA [auth x], KB [auth KA], KC [auth L], KD [auth 3A], KE [auth QB], L [auth b], LA [auth y], LB [auth LA], LC [auth hA], LD [auth 4A], LE [auth RB], M [auth c], MA [auth z], MB [auth I], MC [auth iA], MD [auth 5A], ME [auth SB], N [auth d], NA [auth 0], NB [auth MA], NC [auth jA], ND [auth 6A], NE [auth TB], O [auth e], OA [auth F], OB [auth NA], OC [auth kA], OD [auth 7A], P [auth f], PA [auth 1], PB [auth OA], PC [auth lA], PD [auth 8A], Q [auth C], QA [auth 2], QB [auth PA], QC [auth mA], QD [auth P], R [auth g], RA [auth 3], RB [auth QA], RC [auth nA], RD [auth 9A], S [auth h], SA [auth 4], SB [auth RA], SC [auth M], SD [auth AB], T [auth i], TA [auth 5], TB [auth SA], TC [auth oA], TD [auth BB], U [auth j], UA [auth 6], UB [auth J], UC [auth pA], UD [auth CB], V [auth k], VA [auth 7], VB [auth TA], VC [auth qA], VD [auth DB], W [auth l], WA [auth G], WB [auth UA], WC [auth rA], WD [auth EB], X [auth m], XA [auth 8], XB [auth VA], XC [auth sA], XD [auth FB], Y [auth D], YA [auth 9], YB [auth WA], YC [auth tA], YD [auth Q], Z [auth n], ZA [auth AA], ZB [auth XA], ZC [auth uA], ZD [auth GB]	30	synthetic construct	Mutation(s): 0

Experimental Data & Validation

Experimental Data

• Method: ELECTRON MICROSCOPY
• Resolution: 3.93 Å
• Aggregation State: FILAMENT 
• Reconstruction Method: HELICAL 

EM Software:

Task	Software Package	Version
RECONSTRUCTION	cryoSPARC
MODEL REFINEMENT	PHENIX	1.20.1_4487

Structure Validation

Entry History & Funding Information

Deposition Data

• Released Date: 2026-02-18 
Deposition Author(s): Das, A., Conticello, V.

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Funding Organization	Location	Grant Number
National Science Foundation (NSF, United States)	United States	--

Revision History  

• Version 1.0: 2026-02-18
  Type: Initial release