8sh7

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TUBB4B and TUBA1A Heterodimer from Human Respiratory Doublet Microtubules

Structural highlights

8sh7 is a 2 chain structure with sequence from Homo sapiens. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
Method:	Electron Microscopy, Resolution 2.8Å
Ligands:	, ,
Resources:	FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT

Disease

TBA1A_HUMAN Lissencephaly due to TUBA1A mutation. The disease is caused by mutations affecting the gene represented in this entry.

Function

TBA1A_HUMAN Tubulin is the major constituent of microtubules. It binds two moles of GTP, one at an exchangeable site on the beta chain and one at a non-exchangeable site on the alpha chain.

Publication Abstract from PubMed

Tubulin, one of the most abundant cytoskeletal building blocks, has numerous isotypes in metazoans encoded by different conserved genes. Whether these distinct isotypes form cell type- and context-specific microtubule structures is poorly understood. Based on a cohort of 12 patients with primary ciliary dyskinesia as well as mouse mutants, we identified and characterized variants in the TUBB4B isotype that specifically perturbed centriole and cilium biogenesis. Distinct TUBB4B variants differentially affected microtubule dynamics and cilia formation in a dominant-negative manner. Structure-function studies revealed that different TUBB4B variants disrupted distinct tubulin interfaces, thereby enabling stratification of patients into three classes of ciliopathic diseases. These findings show that specific tubulin isotypes have distinct and nonredundant subcellular functions and establish a link between tubulinopathies and ciliopathies.

Ciliopathy patient variants reveal organelle-specific functions for TUBB4B in axonemal microtubules.,Dodd DO, Mechaussier S, Yeyati PL, McPhie F, Anderson JR, Khoo CJ, Shoemark A, Gupta DK, Attard T, Zariwala MA, Legendre M, Bracht D, Wallmeier J, Gui M, Fassad MR, Parry DA, Tennant PA, Meynert A, Wheway G, Fares-Taie L, Black HA, Mitri-Frangieh R, Faucon C, Kaplan J, Patel M, McKie L, Megaw R, Gatsogiannis C, Mohamed MA, Aitken S, Gautier P, Reinholt FR, Hirst RA, O'Callaghan C, Heimdal K, Bottier M, Escudier E, Crowley S, Descartes M, Jabs EW, Kenia P, Amiel J, Bacci GM, Calogero C, Palazzo V, Tiberi L, Blumlein U, Rogers A, Wambach JA, Wegner DJ, Fulton AB, Kenna M, Rosenfeld M, Holm IA, Quigley A, Hall EA, Murphy LC, Cassidy DM, von Kriegsheim A, Papon JF, Pasquier L, Murris MS, Chalmers JD, Hogg C, Macleod KA, Urquhart DS, Unger S, Aitman TJ, Amselem S, Leigh MW, Knowles MR, Omran H, Mitchison HM, Brown A, Marsh JA, Welburn JPI, Ti SC, Horani A, Rozet JM, Perrault I, Mill P Science. 2024 Apr 26;384(6694):eadf5489. doi: 10.1126/science.adf5489. Epub 2024 , Apr 26. PMID:38662826^[1]

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

References

↑ Dodd DO, Mechaussier S, Yeyati PL, McPhie F, Anderson JR, Khoo CJ, Shoemark A, Gupta DK, Attard T, Zariwala MA, Legendre M, Bracht D, Wallmeier J, Gui M, Fassad MR, Parry DA, Tennant PA, Meynert A, Wheway G, Fares-Taie L, Black HA, Mitri-Frangieh R, Faucon C, Kaplan J, Patel M, McKie L, Megaw R, Gatsogiannis C, Mohamed MA, Aitken S, Gautier P, Reinholt FR, Hirst RA, O'Callaghan C, Heimdal K, Bottier M, Escudier E, Crowley S, Descartes M, Jabs EW, Kenia P, Amiel J, Bacci GM, Calogero C, Palazzo V, Tiberi L, Blümlein U, Rogers A, Wambach JA, Wegner DJ, Fulton AB, Kenna M, Rosenfeld M, Holm IA, Quigley A, Hall EA, Murphy LC, Cassidy DM, von Kriegsheim A, Papon JF, Pasquier L, Murris MS, Chalmers JD, Hogg C, Macleod KA, Urquhart DS, Unger S, Aitman TJ, Amselem S, Leigh MW, Knowles MR, Omran H, Mitchison HM, Brown A, Marsh JA, Welburn JPI, Ti SC, Horani A, Rozet JM, Perrault I, Mill P. Ciliopathy patient variants reveal organelle-specific functions for TUBB4B in axonemal microtubules. Science. 2024 Apr 26;384(6694):eadf5489. PMID:38662826 doi:10.1126/science.adf5489