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Atlas of Genetics and Cytogenetics in Oncology and Haematology INIST-CNRS OPEN ACCESS JOURNAL Gene Section Review KIF14 (kinesin family member 14) Brigitte L Thériault, Timothy W Corson Division of Applied Molecular Oncology, Ontario Cancer Institute/Princess Margaret Hospital, University Health Network, Toronto, ON, Canada (BLT), Eugene & Marilyn Glick Eye Institute, Department of Ophthalmology, and Department of Biochemistry and Molecular Biology, Indiana University School of Medicine, USA (TWC) Published in Atlas Database: April 2012 Online updated version : http://AtlasGeneticsOncology.org/Genes/KIF14ID44138ch1q32.html DOI: 10.4267/2042/48141 This article is an update of : Thériault BL, Corson TW. KIF14 (kinesin family member 14). Atlas Genet Cytogenet Oncol Haematol 2008;12(4):311-313. This work is licensed under a Creative Commons Attribution-Noncommercial-No Derivative Works 2.0 France Licence. © 2012 Atlas of Genetics and Cytogenetics in Oncology and Haematology DNA/RNA kinesin motor and forkhead-associated (FHA) domains. It is a member of the N-3 family of kinesins, in which the motor domain lies close to the amino terminus (Miki et al., 2001), although the relatively long Nterminal extension in KIF14 is unique in this family. High-throughput studies have identified phosphorylations on Ser-12, Tyr-196, Thr-240, Ser242, Ser-378, Ser-384, Ser-670, Ser-1200, Ser-1292, Ser-1631, Ser-1636 and Thr-1641 (P) (Nomura et al., 1994; Olsen et al., 2006; Vasilescu et al., 2007; Dephoure et al., 2008), and ubiquitination on Lys-275 (U) (Olsen et al., 2006; Vasilescu et al., 2007). Description Expression Gene spans 68,5 kbp on the minus strand at 1q32.1. One known 6586 base transcript, 30 exons. The KIF14 promoter is bound by p130/E2F4 under growth arrest conditions (Cam et al., 2004); further details of transcriptional regulation are currently lacking. KIF14 was cloned from an immature myeloid cell line, KG-1 (Nomura et al., 1994). By qRT-PCR, KIF14 is expressed at low levels in normal adult tissues and at higher levels in placenta and fetal tissues; highest expression is in fetal thymus and liver (Corson et al., 2005). KIF14 expression varies with the cell cycle, with highest expression at G2-M (Carleton et al., 2006). Pseudogene Localisation None annotated. In HeLa cells, KIF14 is localized to the cytoplasm during interphase, and becomes tightly localized to the midbody and central spindle during cytokinesis (Carleton et al., 2006; Gruneberg et al., 2006). Identity Other names: KIAA0042 HGNC (Hugo): KIF14 Location: 1q32.1 Local order: Genes flanking KIF14 at 1q32.1 are (centromeric to telomeric): ZNF281 (zinc finger protein 281), KIF14, DDX59 (DEAD (Asp-Glu-Ala-Asp) box polypeptide 59). Transcription Protein Description KIF14 is a 186 kDa, 1648 aa protein, containing Atlas Genet Cytogenet Oncol Haematol. 2012; 16(10) 695 KIF14 (kinesin family member 14) Thériault BL, Corson TW Schematic representation of the KIF14 protein (not to scale). KIF14 contains two major effector domains. The first is a highly conserved 274 aa kinesin motor domain containing an ATP-binding site (aa 447-454) which is involved in microtubule-dependent ATPase activity, and a microtubule binding site (aa 455-628) involved in ATP-dependent protein transport. The second is a 67 aa forkhead-associated (FHA) domain (aa 825-891) which has similarity to the SMAD Mad Homology 2 (MH2) domain, and is involved in mediating protein-protein interactions with phosphoproteins, although no such interactions have been documented for KIF14 (Durocher et al., 2000). In addition to the highly conserved N-type neck region (N) adjacent to the motor domain, KIF14 also contains four other Cterminal regions predicted to form coiled-coil structures (1-4). Phosphorylation sites have been identified in high-throughput studies on Ser-12, Tyr-196, Thr-240, Ser-242, Ser-378, Ser-384, Ser-670, Ser-1200, Ser-1292, Ser-1631, Ser-1636 and Thr-1641 (P) (Nomura et al., 1994; Olsen et al., 2006; Vasilescu et al., 2007; Dephoure et al., 2008), and a ubiquitination site identified on Lys-275 (U) (Olsen et al., 2006; Vasilescu et al., 2007). The kinesin motor and FHA domains are flanked by a 354 aa N-terminal extension, and a 758 aa Cterminal stalk and tail region. The N-terminal extension is involved in the binding of PRC1 (protein-regulating cytokinesis 1), a protein crucial for the proper formation of the central spindle structure during cytokinesis. Citron kinase has been shown to interact with the Cterminal stalk and tail of KIF14, and this interaction is required for proper localization of KIF14 to the mitotic spindle. Supervillin, a membrane protein involved in directing cellular motility, has been shown to associate directly with the distal C-terminal tail of KIF14 and contributes to the establishment or maintenance of the cytokinetic furrow (Smith et al., 2010). Function Somatic KIF14 is a mitotic kinesin motor protein with ATPase activity (Carleton et al., 2006). It interacts with protein regulator of cytokinesis 1 (PRC1) and is essential for localizing citron kinase to the mitotic spindle (Gruneberg et al., 2006). KIF14 knockdown results in failure of cytokinesis, leading to multinucleation and/or apoptosis, but no chromosome segregation defects (Carleton et al., 2006; Gruneberg et al., 2006). KIF14 also interacts with supervillin and contributes to the establishment or maintenance of the cytokinetic furrow (Smith et al., 2010). In addition, KIF14 was identified as a β-arrestin 2 interacting protein in the nucleus of mature spermatozoa (Neuhaus et al., 2006). Missense somatic mutations were detected in two metastatic melanomas. Each mutations was heterozygous and observed in a single tumor. They were c.1490 C>T, P351S and c.1539 C>T, P367L (Wei et al., 2011). Heterozygous somatic mutations were detected in five breast ductal carcinoma tumors. Each mutation was observed in a single tumor and included three missense mutations (c.3676T>A, p.S1226T; c.4363G>C, p.E1455Q and c.1A>G, p.M1V), one synonymous mutation (c.4539T>A, p.A1513A), and one nonsense mutation (c.4402G>T, p.E1468*) (Wood et al., 2007). Missense heterozygous somatic mutations were detected in two ovarian carcinomas and each mutation was observed in a single tumor: c.2096G>A, p.R699H and c.4654C>T, p.P1552S (Cancer Genome Atlas Research Network, 2011). Homology There are KIF14 orthologs in several mammalian species. The closest Drosophila melanogaster gene, with 40% amino acid identity, is nebbish/tiovivo, encoding Klp38B (kinesin-like protein 38B). Klp38B is a mitotic kinesin that binds to chromatin and microtubules in the formation of the bipolar spindle and attachment of chromosomes to the spindle, and/or acts in cytokinesis (Molina et al., 1997; Ohkura et al., 1997). Implicated in Retinoblastoma Prognosis KIF14 mRNA and protein expression is greatly increased in retinoblastoma tumors versus normal adult and fetal retina (Corson et al., 2005). mRNA expression is higher in older patients' tumors than younger (Madhavan et al., 2007), and shows a modest association with unilateral disease (Madhavan et al., 2009). KIF14 mRNA level increases with the progression from normal retina to benign retinoma to retinoblastoma (Dimaras et al., 2008). Mutations Germinal None yet identified. Atlas Genet Cytogenet Oncol Haematol. 2012; 16(10) 696 KIF14 (kinesin family member 14) Thériault BL, Corson TW KIF14 was the only gene within the documented 1q "hot spot" region of gain (1q31.3-1q32.1) (Corson et al., 2005) to be overexpressed in ovarian carcinomas compared to normal tubal epithelium and ovarian surface epithelium (Thériault et al., 2012). Oncogenesis Overexpression of KIF14 enhances proliferation, and in vitro tumorigenic potential in ovarian cancer cell lines. Knockdown significantly reduces in vitro proliferation and tumorigenicity, and induces an apoptotic response (Thériault et al., 2012). Cytogenetics KIF14 lies in a "hotspot" of genomic gain at 1q31.31q32.1 (Corson et al., 2005). Low-level genomic gain (3-5 copies) of the gene is observed in 50% of tumors (Bowles et al., 2007). Highlevel amplification has been observed in one tumor (along with, but independent of, MYCN amplification) (Bowles et al., 2007). KIF14 copy number increases during the progression from normal retina to benign retinoma to retinoblastoma (Dimaras et al., 2008). Oncogenesis In support of KIF14's importance in retinoblastoma, the mouse ortholog Kif14 is expressed in retinal tumors in the retinal SV40 Large T Antigen (TAg-RB) model of retinoblastoma at levels higher than at any point in mouse retinal development (Pajovic et al., 2011). Hepatocellular carcinoma (HCC) Prognosis KIF14 is overexpressed in HCC. Cytogenetics Low-level gain of the KIF14 locus is seen in 58% tumors (Bowles et al., 2007). A KIF14-containing region spanning 1q32.1-1q44 was the second most common alteration in a series of HCC, and KIF14 mRNA and protein expression were increased in tumors with gain of this region (Kim et al., 2008). Breast carcinoma Prognosis mRNA expression increases with grade, and is higher in ductal than lobular carcinoma, and in estrogen receptor (ER) negative over ER positive tumors. Expression correlates with proliferation, and overexpression is prognostic for poor overall and disease-free survival (Corson and Gallie, 2006). Cytogenetics KIF14 lies in a "hotspot" of genomic gain at 1q31.31q32.1. Low-level genomic gain of the gene is observed in 50% of breast cancer cell lines (Bowles et al., 2007). Pancreatic carcinoma Prognosis KIF14 was identified by expression microarray (and confirmed by RT-PCR and immunoblot) as downregulated in neuroinvasive versus non-invasive pancreatic carcinoma cell lines. However, KIF14 was upregulated in chronic pancreatitis and pancreatic cancer versus normal pancreas (Abiatari et al., 2009). Oncogenesis Knockdown of KIF14 increased invasiveness of T3M4 cells and also increased resistance to anoikis of these cells (Abiatari et al., 2009). Non-small-cell lung carcinoma (NSCLC) Prognosis mRNA expression decreases with differentiation, and is higher in squamous cell than adenocarcinoma. Overexpression is independently prognostic for poor disease-free survival, and prognostic for poor overall survival (Corson et al., 2007). Oncogenesis Knockdown of KIF14 decreases proliferation of H1299 NSCLC cells, and decreases their ability to form colonies in soft agar (Corson et al., 2007). Papillary renal cell tumors Prognosis Gain of a region of 1q including KIF14 is associated with fatal progression, and KIF14 is one of two genes overexpressed in tumors with this gain to a higher level than in tumors without 1q gain (Szponar et al., 2009). Ovarian carcinoma Glioblastoma multiforme Prognosis KIF14 is overexpressed in the majority of ovarian cancers tested (91%). KIF14 mRNA expression is independently prognostic for poor overall survival and prognostic for poor progression-free survival in serous ovarian cancers (Thériault et al., 2012). Cytogenetics Low-level gain (3 to 5 copies) of KIF14 is observed in 30% of serous ovarian cancers, and corresponds to high mRNA overexpression (Thériault et al., 2012). Cytogenetics Two translocation breakpoints in a series of 32 tumors mapped to 1q32. KIF14 was identified as an overexpressed gene in a region of somatic gain around this breakpoint (Leone et al., 2012). Atlas Genet Cytogenet Oncol Haematol. 2012; 16(10) Laryngeal carcinoma Oncogenesis KIF14 is one of three microarray-identified genes validated as a marker of laryngeal carcinoma (Markowski et al., 2009). 697 KIF14 (kinesin family member 14) Thériault BL, Corson TW Bowles E, Corson TW, Bayani J, Squire JA, Wong N, Lai PB, Gallie BL. Profiling genomic copy number changes in retinoblastoma beyond loss of RB1. Genes Chromosomes Cancer. 2007 Feb;46(2):118-29 To be noted Note Numerous microarray studies indexed in Oncomine document overexpression of KIF14 in other cancers, including brain tumors, seminoma, prostate and tongue cancers. Corson TW, Zhu CQ, Lau SK, Shepherd FA, Tsao MS, Gallie BL. KIF14 messenger RNA expression is independently prognostic for outcome in lung cancer. Clin Cancer Res. 2007 Jun 1;13(11):3229-34 Madhavan J, Coral K, Mallikarjuna K, Corson TW, Amit N, Khetan V, George R, Biswas J, Gallie BL, Kumaramanickavel G. 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Int J Cancer. 2012 Apr 15;130(8):1844-54 Pajovic S, Corson TW, Spencer C, Dimaras H, Orlic-Milacic M, Marchong MN, To KH, Thériault B, Auspitz M, Gallie BL. The TAg-RB murine retinoblastoma cell of origin has immunohistochemical features of differentiated Muller glia with progenitor properties. Invest Ophthalmol Vis Sci. 2011 Sep;52(10):7618-24 This article should be referenced as such: Thériault BL, Corson TW. KIF14 (kinesin family member 14). Atlas Genet Cytogenet Oncol Haematol. 2012; 16(10):695-699. Wei X, Walia V, Lin JC, Teer JK, Prickett TD, Gartner J, Davis S, Stemke-Hale K, Davies MA, Gershenwald JE, Robinson W, Robinson S, Rosenberg SA, Samuels Y. Exome sequencing identifies GRIN2A as frequently mutated in melanoma. Nat Genet. 2011 May;43(5):442-6 Atlas Genet Cytogenet Oncol Haematol. 2012; 16(10) 699