A novel ankyrin repeat-containing gene (Kank) located at 9p24 is a growth suppressor of renal cell carcinoma.
By a combination of genome subtraction and comprehensive analysis of loss of heterozygosity based on mapping hemizygous deletions for a potential tumor-related locus, a minimum overlapping region of deletions at 9p24 the size of 165 kb was identified and found to harbor a new potential tumor suppressor gene for renal cell carcinoma, the Kank gene. Kank (for kidney ankyrin repeat-containing protein) contains four ankyrin repeats at its C terminus. Expression of the gene was suppressed in 6 of 8 or 6 of 10 cancer tissues examined by reverse transcription-PCR or Western blotting, respectively, and in several kidney tumor cell lines due to methylation at CpG sites in the gene. Epigenetic methylation or imprinting seemed to be the first hit, which was followed by a second hit of deletion, resulting in loss of function in many of these deletion cases. Expression of this gene in expression-negative HEK293 cells induced growth retardation at G(0)/G(1) as well as morphological changes.
Research Center for Glycoscience, National Institute of Advanced Industrial Science and Technology, 1-1-1 Higashi, Tsukuba, Ibaraki 305-8566, Japan.
Shubhashish
S
Sarkar
Badal Chandra
BC
Roy
Naoya
N
Hatano
Teiichiro
T
Aoyagi
Kazuo
K
Gohji
Ryoiti
R
Kiyama
D000199:Actins / Q000378:metabolism; D048868:Adaptor Proteins, Signal Transducing; D000595:Amino Acid Sequence; D000818:Animals; D017487:Ankyrins / Q000378:metabolism; D015153:Blotting, Western; D002292:Carcinoma, Renal Cell / Q000235:genetics*; D002455:Cell Division; D002460:Cell Line; D002874:Chromosome Mapping; D002899:Chromosomes, Human, Pair 9; D018899:CpG Islands; D003598:Cytoskeletal Proteins; D003600:Cytosol / Q000378:metabolism; D019175:DNA Methylation; D018076:DNA, Complementary / Q000378:metabolism; D017353:Gene Deletion; D006801:Humans; D015151:Immunoblotting; D007680:Kidney Neoplasms / Q000235:genetics*; D019656:Loss of Heterozygosity; D051379:Mice; D008957:Models, Genetic; D008969:Molecular Sequence Data; D011233:Precipitin Tests; D017434:Protein Structure, Tertiary; D020133:Reverse Transcriptase Polymerase Chain Reaction; D014407:Tumor Cells, Cultured; D025521:Tumor Suppressor Proteins / Q000235:genetics* / Q000502:physiology*
D000199:Actins; D048868:Adaptor Proteins, Signal Transducing; D017487:Ankyrins; D003598:Cytoskeletal Proteins; D018076:DNA, Complementary; C467739:KANK1 protein, human; D025521:Tumor Suppressor Proteins