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Deposition Date 2011-11-14
Release Date 2011-11-30
Last Version Date 2024-02-28
Entry Detail
PDB ID:
3UMN
Keywords:
STRUCTURAL PROTEIN
Title:
Crystal Structure of Lamin-B1
Biological Source:
Source Organism(s):
Homo sapiens (Taxon ID: 9606)
Expression System(s):
Escherichia coli
Method Details:
Experimental Method:
X-RAY DIFFRACTION
Resolution:
2.00 Å
R-Value Free:
0.26
R-Value Work:
0.24
R-Value Observed:
0.24
Space Group:
C 2 2 2
3UMN validation report
Macromolecular Entities
Structures with similar UniProt ID
Protein Blast
Polymer Type:polypeptide(L)
Molecule:Lamin-B1
Gene (Uniprot):LMNB1
Chain IDs:A, B, C
Chain Length:123
Number of Molecules:3
Biological Source:Homo sapiens
UniProt ID:P20700 Pfam ID:PF00932
Primary Citation
Crystal structures of the coil 2B fragment and the globular tail domain of human lamin B1.
Febs Lett. 586 314 318 (2012)
PMID: 22265972 DOI: 10.1016/j.febslet.2012.01.007

Abstact

We present here the crystal structures of human lamin B1 globular tail domain and coiled 2B domain, which adopt similar folds to Ig-like domain and coiled-coil domain of lamin A, respectively. Despite the overall similarity, we found an extra intermolecular disulfide bond in the lamin B1 coil 2B domain, which does not exist in lamin A/C. In addition, the structural analysis indicates that interactions at the lamin B1 homodimer interface are quite different from those of lamin A/C. Thus our research not only reveals the diversely formed homodimers among lamin family members, but also sheds light on understanding the important roles of lamin B1 in forming the nuclear lamina matrix.

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