The KIF7 gene provides instructions for making a protein that is associated with structures called primary cilia. These microscopic, finger-like projections stick out from the surface of cells and are involved in signaling pathways that transmit information into cells. Studies suggest that the KIF7 protein helps to maintain the proper length and stability of cilia.
Through its association with primary cilia, the KIF7 protein helps regulate a signaling pathway known as Sonic Hedgehog. This pathway is essential for early development. It plays roles in cell growth, cell specialization, and the normal shaping (patterning) of many parts of the body, including the brain and limbs.
Health Conditions Related to Genetic Changes
At least 20 mutations in the KIF7 gene have been identified in people with acrocallosal syndrome. This rare condition is characterized by certain brain abnormalities, the presence of extra fingers and toes (polydactyly), and distinctive facial features, including widely spaced eyes (hypertelorism) and a prominent forehead. Most of the KIF7 gene mutations that cause acrocallosal syndrome lead to the production of an abnormally short, nonfunctional version of the KIF7 protein or prevent any protein from being produced from the gene. Little is known about the effects of these mutations, although they likely disrupt Sonic Hedgehog signaling during early development. It is unclear how these changes impair the development of the brain, limbs, and other parts of the body in people with acrocallosal syndrome.More About This Health Condition
MedlinePlus Genetics provides information about Joubert syndromeMore About This Health Condition
Other Names for This Gene
- kinesin-like protein KIF7
Additional Information & Resources
Tests Listed in the Genetic Testing Registry
Scientific Articles on PubMed
Catalog of Genes and Diseases from OMIM
- Dafinger C, Liebau MC, Elsayed SM, Hellenbroich Y, Boltshauser E, Korenke GC, Fabretti F, Janecke AR, Ebermann I, Nürnberg G, Nürnberg P, Zentgraf H, Koerber F, Addicks K, Elsobky E, Benzing T, Schermer B, Bolz HJ. Mutations in KIF7 link Joubert syndrome with Sonic Hedgehog signaling and microtubule dynamics. J Clin Invest. 2011 Jul;121(7):2662-7. doi: 10.1172/JCI43639. Citation on PubMed or Free article on PubMed Central
- He M, Subramanian R, Bangs F, Omelchenko T, Liem KF Jr, Kapoor TM, Anderson KV. The kinesin-4 protein Kif7 regulates mammalian Hedgehog signalling by organizing the cilium tip compartment. Nat Cell Biol. 2014 Jul;16(7):663-72. doi: 10.1038/ncb2988. Epub 2014 Jun 22. Citation on PubMed or Free article on PubMed Central
- Putoux A, Nampoothiri S, Laurent N, Cormier-Daire V, Beales PL, Schinzel A, Bartholdi D, Alby C, Thomas S, Elkhartoufi N, Ichkou A, Litzler J, Munnich A, Encha-Razavi F, Kannan R, Faivre L, Boddaert N, Rauch A, Vekemans M, Attié-Bitach T. Novel KIF7 mutations extend the phenotypic spectrum of acrocallosal syndrome. J Med Genet. 2012 Nov;49(11):713-20. doi: 10.1136/jmedgenet-2012-101016. Citation on PubMed
- Putoux A, Thomas S, Coene KL, Davis EE, Alanay Y, Ogur G, Uz E, Buzas D, Gomes C, Patrier S, Bennett CL, Elkhartoufi N, Frison MH, Rigonnot L, Joyé N, Pruvost S, Utine GE, Boduroglu K, Nitschke P, Fertitta L, Thauvin-Robinet C, Munnich A, Cormier-Daire V, Hennekam R, Colin E, Akarsu NA, Bole-Feysot C, Cagnard N, Schmitt A, Goudin N, Lyonnet S, Encha-Razavi F, Siffroi JP, Winey M, Katsanis N, Gonzales M, Vekemans M, Beales PL, Attié-Bitach T. KIF7 mutations cause fetal hydrolethalus and acrocallosal syndromes. Nat Genet. 2011 Jun;43(6):601-6. doi: 10.1038/ng.826. Epub 2011 May 8. Citation on PubMed or Free article on PubMed Central