Chromosome 7

Chromosome 7 is one of the 23 pairs of chromosomes in humans, who normally have two copies of this chromosome. Chromosome 7 spans about 160 million base pairs (the building material of DNA) and represents between 5 and 5.5 percent of the total DNA in cells. The following are some of the gene count estimates of human chromosome 7. Because researchers use different approaches to genome annotation their predictions of the number of genes on each chromosome varies (for technical details, see gene prediction). Among various projects, the collaborative consensus coding sequence project (CCDS) takes an extremely conservative strategy. So CCDS's gene number prediction represents a lower bound on the total number of human protein-coding genes. Genes on human chromosome 7 The following is a partial list of genes on human chromosome 7. For complete list, see the link in the infobox on the right. The following diseases are some of those related to genes on chromosome 7: 7p22.1 microduplication syndrome argininosuccinic aciduria cerebral cavernous malformation Charcot–Marie–Tooth disease Cholestasis, progressive familial intrahepatic 3 Citrullinemia, type II, adult-onset, congenital bilateral absence of vas deferens cystic fibrosis Developmental verbal dyspraxia distal spinal muscular atrophy, type V Ehlers–Danlos syndrome hemochromatosis, type 3 Hereditary nonpolyposis colorectal cancer HNPCC4 Lissencephaly syndrome, norman-roberts type Marfan syndrome maple syrup urine disease maturity onset diabetes of the young type 3 mucopolysaccharidosis type VII or Sly syndrome Muscular dystrophy, limb-girdle, type 1D myelodysplastic syndrome Myotonia congenita nonsyndromic deafness osteogenesis imperfecta p47-phox-deficient chronic granulomatous disease Pectus excavatum Pendred syndrome Romano–Ward syndrome Shwachman–Diamond syndrome Schizophrenia Silver-Russell syndrome Specific language impairment Tritanopia or tritanomaly color blindness Williams syndrome Zellweger syndrome The following conditions are caused by changes in the structure or number of copies of chromosome 7: Williams syndrome is caused by the deletion of genetic material from a portion of the long (q) arm of chromosome 7.