6XZ4 image
Deposition Date 2020-02-01
Release Date 2020-05-27
Last Version Date 2024-01-24
Entry Detail
PDB ID:
6XZ4
Keywords:
Title:
Crystal structure of TLNRD1
Biological Source:
Source Organism:
Homo sapiens (Taxon ID: 9606)
Method Details:
Experimental Method:
Resolution:
2.30 Å
R-Value Free:
0.31
R-Value Work:
0.26
R-Value Observed:
0.26
Space Group:
P 1 21 1
Macromolecular Entities
Polymer Type:polypeptide(L)
Molecule:Talin rod domain-containing protein 1
Gene (Uniprot):TLNRD1
Chain IDs:A, B
Chain Length:368
Number of Molecules:2
Biological Source:Homo sapiens
Primary Citation
Talin rod domain-containing protein 1 (TLNRD1) is a novel actin-bundling protein which promotes filopodia formation.
J.Cell Biol. 220 ? ? (2021)
PMID: 34264272 DOI: 10.1083/jcb.202005214

Abstact

Talin is a mechanosensitive adapter protein that couples integrins to the cytoskeleton. Talin rod domain-containing protein 1 (TLNRD1) shares 22% homology with the talin R7R8 rod domains, and is highly conserved throughout vertebrate evolution, although little is known about its function. Here we show that TLNRD1 is an α-helical protein structurally homologous to talin R7R8. Like talin R7R8, TLNRD1 binds F-actin, but because it forms a novel antiparallel dimer, it also bundles F-actin. In addition, it binds the same LD motif-containing proteins, RIAM and KANK, as talin R7R8. In cells, TLNRD1 localizes to actin bundles as well as to filopodia. Increasing TLNRD1 expression enhances filopodia formation and cell migration on 2D substrates, while TLNRD1 down-regulation has the opposite effect. Together, our results suggest that TLNRD1 has retained the diverse interactions of talin R7R8, but has developed distinct functionality as an actin-bundling protein that promotes filopodia assembly.

Legend

Protein

Chemical

Disease

Primary Citation of related structures