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Cilia and flagella associated protein 157 (CFAP157) also known as chromosome 9 open reading frame 117 (c9orf117) is a protein that in humans is encoded by the CFAP157 gene.

AliasesCFAP157, C9orf117, cilia and flagella associated protein 157
External IDsMGI: 2447809 HomoloGene: 53056 GeneCards: CFAP157
Gene location (Human)
Chromosome 9 (human)
Chr.Chromosome 9 (human)[1]
Chromosome 9 (human)
Genomic location for CFAP157
Genomic location for CFAP157
Band9q34.11Start127,706,988 bp[1]
End127,716,002 bp[1]
RefSeq (mRNA)



RefSeq (protein)



Location (UCSC)Chr 9: 127.71 – 127.72 MbChr 2: 32.78 – 32.78 Mb
PubMed search[3][4]
View/Edit HumanView/Edit Mouse

CFAP157 gene is "specifically required during spermatogenesis for flagellum morphogenesis and sperm motility and may be required to suppress the formation of supernumerary axonemes and ensure a correct ultrastructure,"[5] according to UniProt.



CFAP157 is located on chromosome 9, 9q34.11 in human from base pair 127,706,989 to base pair 127,716,002.[6]

Location of CFAP157 in chromosome 9


The size of the gene is 9,013 bases, and the orientation is plus strand.[6] The gene holds 9 exons.[7]


The most common variant of mRNAs of CFAP157 contains 1,722 base pairs.[7]


CFAP157 is expressed in many human body tissues such as cervix, lung, testis, and uterus. People who have uterine tumor are likely to have an expression in CFAP157. This gene is expressed in both adults and fetuses.[8]


There are 520 amino acids in CFAP157 in human.[9] The protein is glutamine extremely rich, and glycine poor. The protein is quite neutral with the isoelectric point at pH 7.4.[10] The average mass of the protein is estimated to be 60,531.748 Da, and the absorption coefficient is estimated to be 25,440 M−1 cm−1.

CFAP157 is primarily composed of α-helices, and there is no transmembrane helix. The protein structure making program called Phyre is used to create the predicted structure of CFAP157.

Predicted structure for CFAP157 made by Phyre


There is no known paralog for CFAP157 in human. CFAP157 has numerous orthologs. The following table contains some of orthologs including human, common chimpanzee, rhesus macaque, cattle, dog, mouse, rat, tropical clawed frog, and zebra fish.[11]

SpeciesCommon NameAccession NumberSequence IdentitySequence Similarity
Homo sapiensHumanNP_001012520100%100%
Pan troglodytesCommon chimpanzeeXP_00114308498.5%99.0%
Macaca mulattaRhesus macaqueXP_00109528195.2%96.4%
Bos taurusCattleXP_00521347770.5%84.0%
Canis lupus familiarisDogXP_00562539271.5%80.9%
Mus musculusMouseNP_07989564.6%79.0%
Rattus norvegicusRatNP_00109433964.2%78.4%
Xenopus tropicalisTropical clawed frogNP_00107277441.5%60.5%
Danio rerioZebrafishNP_00110363834.0%54.9%

Interacting ProteinsEdit

P14335 (Kunjin virus strain MRM61C) is the virus that interacts with CFAP157 via two-hybrid screening. Kunjin virus is not as severe as other viruses, but this is a noticeable discovery because it is possible to exploit the interaction to develop new types of medicine. Researchers at the University of Queensland discovered a new medical use for the Kunjin virus in 2005, and the possible treatments include HIV/cancer vaccines.[12]


  1. ^ a b c GRCh38: Ensembl release 89: ENSG00000160401 - Ensembl, May 2017
  2. ^ a b c GRCm38: Ensembl release 89: ENSMUSG00000038987 - Ensembl, May 2017
  3. ^ "Human PubMed Reference:". National Center for Biotechnology Information, U.S. National Library of Medicine.
  4. ^ "Mouse PubMed Reference:". National Center for Biotechnology Information, U.S. National Library of Medicine.
  5. ^ "CFAP157 - Cilia- and flagella-associated protein 157 - Homo sapiens (Human) - CFAP157 gene & protein". Retrieved 2018-02-05.
  6. ^ a b Database, GeneCards Human Gene. "CFAP157 Gene - GeneCards | CF157 Protein | CF157 Antibody". Retrieved 2018-02-20.
  7. ^ a b "Homo sapiens cilia and flagella associated protein 157 (CFAP157), tran - Nucleotide - NCBI". Retrieved 2018-04-23.
  8. ^ Group, Schuler. "EST Profile - Hs.652519". Retrieved 2018-04-23.
  9. ^ "cilia- and flagella-associated protein 157 [Homo sapiens] - Protein - NCBI". Retrieved 2018-02-20.
  10. ^ "Prot pi | Bioinformatics Calculator". Retrieved 2018-04-23.
  11. ^ "BLAST: Basic Local Alignment Search Tool". Retrieved 2018-04-23.
  12. ^ "New medical uses for the Kunjin virus". 2005-04-12. Retrieved 2018-05-06.