4YI0

Structure of mouse importin a1 bound to Pom121NLS

• PDB DOI: https://doi.org/10.2210/pdb4YI0/pdb

• Classification: PROTEIN TRANSPORT
• Organism(s): Mus musculus, Rattus norvegicus
• Expression System: Escherichia coli
• Mutation(s): No 


• Deposited: 2015-02-27 Released: 2016-01-13 
• Deposition Author(s): Lokareddy, R.K., Cingolani, G.
• Funding Organization(s): National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.81 Å
• R-Value Free: 0.210 
• R-Value Work: 0.182 
• R-Value Observed: 0.183 

Literature

Mammalian Pom121 and yeast Heh2 share IBB-like NLSs that support targeting to the inner nuclear membrane

Kralt, A., Basheer, N.J., van den Boom, V., Lokareddy, R.K., Steen, A., Cingolani, G., Fornerod, M., Veenhoff, L.M.

To be published.

Biological Assembly 1  

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Hetero 2-mer - A1B1 

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

Macromolecule Content

• Total Structure Weight: 53.53 kDa 
• Atom Count: 4,053 
• Modelled Residue Count: 452 
• Deposited Residue Count: 490 
• Unique protein chains: 2

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Importin subunit alpha-1	A [auth C]	460	Mus musculus	Mutation(s): 0  Gene Names: Kpna2, Rch1
UniProt & NIH Common Fund Data Resources
Find proteins for P52293 (Mus musculus) Explore P52293  Go to UniProtKB:  P52293
IMPC:  MGI:103561

Entity ID: 2
Molecule	Chains	Sequence Length	Organism	Details	Image
Nuclear envelope pore membrane protein POM 121	B [auth A]	30	Rattus norvegicus	Mutation(s): 0  Gene Names: Pom121, Nup121
UniProt
Find proteins for P52591 (Rattus norvegicus) Explore P52591  Go to UniProtKB:  P52591

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 1.81 Å
• R-Value Free: 0.210 
• R-Value Work: 0.182 
• R-Value Observed: 0.183 
• Space Group: P 2₁ 2₁ 2₁

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 78.337	α = 90
b = 89.753	β = 90
c = 97.868	γ = 90

Software Package:

Software Name	Purpose
PHENIX	refinement
HKL-2000	data reduction
HKL-2000	data scaling
PHASER	phasing

Structure Validation

Entry History & Funding Information

Deposition Data

• Released Date: 2016-01-13 
Deposition Author(s): Lokareddy, R.K., Cingolani, G.

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Funding Organization	Location	Grant Number
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)	United States	GM074846-01A1

Revision History  

• Version 1.0: 2016-01-13
  Type: Initial release
  
• Version 1.1: 2017-09-20
  Changes: Author supporting evidence, Derived calculations
• Version 1.2: 2019-12-25
  Changes: Author supporting evidence
• Version 1.3: 2023-09-27
  Changes: Data collection, Database references, Refinement description