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TTC26

From SNPedia

is agene
is mentioned by
Full nametetratricopeptide repeat domain 26
Other namesDYF13
EntrezGene79989
PheGenI79989
VariationViewer79989
ClinVarTTC26
GeneCardsTTC26
dbSNP79989
SADR79989
HugeNav79989
wikipediaTTC26
googleTTC26
gopubmedTTC26
EVSTTC26
HEFalMpTTC26
MyGene2TTC26
23andMeTTC26
UniProtA0AVF1
EnsemblENSG00000105948
# SNPs4
 Max MagnitudeChromosome positionSummary
rs10215341139,132,793
rs10248924139,146,961
rs10268763139,157,058
rs132259173139,166,872

Codes for protein that is IFT complex B protein, also known as DYF13 in nematodes and has a proposed function-dependent name of IFT56.

TTC26 is thought to play a critical role in ciliogenesis and normal cilia (cellular "hairs") function, as determined by protein similarity, and it is highly conserved between ciliated species studied. In studies on Zebrafish, disabling the gene prevented normal development of photoreceptor sensory and other cilia. The protein is neccessary for assembly of full length cilia. Studies suggest the protein may play role in Inhertited Retinal Degenration and screening for TTC26 mutations in human ciliopathies.

Looking at this in HapMap is fairly interesting, there is a haplotype spanning the whole gene and not much else. 8.8% of 205 CEU+TSI individuals have African haplotype with every SNP included by HapMap in the gene changed to the minor allele. rs10268763 can be used to differentiate between these two "ancestral" haplotypes, there seems to be a slight bias towards homozygous haplotypes for these variants, possibly due to population structure. 0.7% have single SNP rs10248924 changed from the most common haplotype, and another 0.7% have rs10215341 changed from the two most common ones, which looks like a potential phasing error. Additional 0.2% have three SNP's changed from the most common variant, but this is single individual on this sample. In conclusion, Europeans have one form of this gene with at least one prominent back-mutation while most Sub-Saharan Africans and Kenyans have very different one, with other populations having a varying mix of the two.


[PMID 24596149] TTC26/DYF13 is an intraflagellar transport protein required for transport of motility-related proteins into flagella.

[PMID 22718903] Knockdown of ttc26 disrupts ciliogenesis of the photoreceptor cells and the pronephros in zebrafish.

[PMID 10517866] The tetratricopeptide repeat: a structural motif mediating protein-protein interactions.