30HD | pdb_000030hd

Structure of histone H1 in an import-chaperone complex with importin beta and importin 7 (ordered regions)

• PDB DOI: https://doi.org/10.2210/pdb30HD/pdb
• EM Map EMD-57539: EMDB EMDataResource

• Classification: TRANSPORT PROTEIN
• Organism(s): Xenopus laevis, Homo sapiens
• Expression System: Escherichia coli
• Mutation(s): No 


• Deposited: 2026-04-24 Released: 2026-09-23 
• Deposition Author(s): Fu, Z., Chafra, F., Freytag, B., Huyton, T., Gorlich, D.
• Funding Organization(s): Max Planck Society

---

Experimental Data Snapshot

• Method: ELECTRON MICROSCOPY
• Resolution: 3.60 Å
• Aggregation State: PARTICLE 
• Reconstruction Method: SINGLE PARTICLE 

Literature

Chaperoning by dynamic encasement: Structural basis of linker histone H1 nuclear import

Fu, Z., Chafra, F., Freytag, B., Huyton, T., Gorlich, D.

(2026) Structure 

• DOI: https://doi.org/10.1016/j.str.2026.09.001

Biological Assembly 1  

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Hetero 3-mer - A1B1C1 

Biological assembly 1 assigned by authors and generated by (software)

Biological Assembly Evidence: electron microscopy

Macromolecule Content 

• Total Structure Weight: 237.8 kDa 
• Atom Count: 15,776 
• Modeled Residue Count: 1,988 
• Deposited Residue Count: 2,109 
• Unique protein chains: 3

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Importin 7 L homeolog	A	1,038	Xenopus laevis	Mutation(s): 0  Gene Names: ipo7.L, imp7, ipo7, MGC52556, ranbp7
UniProt
Find proteins for O42480 (Xenopus laevis) Explore O42480  Go to UniProtKB:  O42480

Entity ID: 2
Molecule	Chains	Sequence Length	Organism	Details	Image
Importin subunit beta-1	B	876	Homo sapiens	Mutation(s): 0  Gene Names: KPNB1, NTF97
UniProt & NIH Common Fund Data Resources
Find proteins for Q14974 (Homo sapiens) Explore Q14974  Go to UniProtKB:  Q14974
PHAROS:  Q14974 GTEx:  ENSG00000108424

Entity ID: 3
Molecule	Chains	Sequence Length	Organism	Details	Image
Histone H1.0	C	195	Homo sapiens	Mutation(s): 0  Gene Names: H1-0, H1F0, H1FV
UniProt & NIH Common Fund Data Resources
Find proteins for P07305 (Homo sapiens) Explore P07305  Go to UniProtKB:  P07305
PHAROS:  P07305 GTEx:  ENSG00000189060

Experimental Data & Validation

Experimental Data

• Method: ELECTRON MICROSCOPY
• Resolution: 3.60 Å
• Aggregation State: PARTICLE 
• Reconstruction Method: SINGLE PARTICLE 

EM Software:

Task	Software Package	Version
RECONSTRUCTION	RELION	5.0.1
MODEL REFINEMENT	PHENIX

Structure Validation

Entry History 

& Funding Information

Deposition Data

• Released Date: 2026-09-23 
Deposition Author(s): Fu, Z., Chafra, F., Freytag, B., Huyton, T., Gorlich, D.

---

Funding Organization	Location	Grant Number
Max Planck Society	Germany	--

Revision History  

• Version 1.0: 2026-09-23
  Type: Initial release