1H8B image
Deposition Date 2001-02-01
Release Date 2001-08-30
Last Version Date 2024-05-15
Entry Detail
PDB ID:
1H8B
Keywords:
STRUCTURAL PROTEIN
Title:
EF-hands 3,4 from alpha-actinin / Z-repeat 7 from titin
Biological Source:
Source Organism:
HOMO SAPIENS (Taxon ID: 9606)
ORYCTOLAGUS CUNICULUS (Taxon ID: 9986)
Host Organism:
ESCHERICHIA COLI
Method Details:
Experimental Method:
SOLUTION NMR
Conformers Calculated:
50
Conformers Submitted:
30
Selection Criteria:
LOWEST ENERGIES
1H8B validation report
Macromolecular Entities
Structures with similar UniProt ID
Protein Blast
Polymer Type:polypeptide(L)
Molecule:ALPHA-ACTININ 2, SKELETAL MUSCLE ISOFORM
Gene (Uniprot):ACTN2
Chain IDs:A
Chain Length:75
Number of Molecules:1
Biological Source:HOMO SAPIENS
UniProt ID:P35609 Pfam ID:PF08726
Structures with similar UniProt ID
Protein Blast
Polymer Type:polypeptide(L)
Molecule:TITIN
Gene (Uniprot):titin
Chain IDs:B
Chain Length:53
Number of Molecules:1
Biological Source:ORYCTOLAGUS CUNICULUS
UniProt ID:O97791 Pfam ID:PF09042
Ligand Molecules
NA
Primary Citation
Ca2+-Independent Binding of an EF-Hand Domain to a Novel Motif in the Alpha-Actinin-Titin Complex
Nat.Struct.Biol. 8 853 ? (2001)
PMID: 11573089 DOI: 10.1038/NSB1001-853

Abstact

The interaction between alpha-actinin and titin, two modular muscle proteins, is essential for sarcomere assembly. We have solved the solution structure of a complex between the calcium-insensitive C-terminal EF-hand domain of alpha-actinin-2 and the seventh Z-repeat of titin. The structure of the complex is in a semi-open conformation and closely resembles that of myosin light chains in their complexes with heavy chain IQ motifs. However, no IQ motif is present in the Z-repeat, suggesting that the semi-open conformation is a general structural solution for calcium-independent recognition of EF-hand domains.

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Primary Citation of related structures
1H8B