Chromosome 6 | |
---|---|
Features | |
Length (bp) | 172,126,628 bp (CHM13) |
No. of genes | 996 (CCDS) [1] |
Type | Autosome |
Centromere position | Submetacentric [2] (59.8 Mbp [3] ) |
Complete gene lists | |
CCDS | Gene list |
HGNC | Gene list |
UniProt | Gene list |
NCBI | Gene list |
External map viewers | |
Ensembl | Chromosome 6 |
Entrez | Chromosome 6 |
NCBI | Chromosome 6 |
UCSC | Chromosome 6 |
Full DNA sequences | |
RefSeq | NC_000006 (FASTA) |
GenBank | CM000668 (FASTA) |
Chromosome 6 is one of the 23 pairs of chromosomes in humans. People normally have two copies of this chromosome. Chromosome 6 spans nearly 171 million base pairs (the building material of DNA) and represents between 5.5 and 6% of the total DNA in cells. It contains the major histocompatibility complex, which contains over 100 genes related to the immune response, and plays a vital role in organ transplantation.
The centromere of chromosome 6 illustrates an interesting example of centromere evolution. It was known[ further explanation needed ] that in a Catarrhini ancestor the chromosome 6 centromere was situated near position 26 Mb of the modern human chromosome. In Macaca mulatta, this old centromere went defunct and repositioned to a different chromosomal location[ relevant? ]. In the case of humans, the old centromere went defunct and a more recent form emerged near the modern position of human cen6 (size of 60 Mb). Such cases are known as Evolutionary New Centromeres (ENC). This assembly phenomenon of the human chromosome 6 gives researchers an opportunity to investigate the origin of the ENC on chromosome 6. [4]
The human leukocyte antigen lies on chromosome 6, with the exception of the gene for β2-microglobulin (which is located on chromosome 15), and encodes cell-surface antigen-presenting proteins among other functions.
In 2003, the entirety of chromosome 6 was manually annotated for proteins, resulting in the identification of 1,557 genes, and 633 pseudogenes. [5]
The following are some of the newer gene count estimates. 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. [6]
Estimated by | Protein-coding genes | Non-coding RNA genes | Pseudogenes | Source | Release date |
---|---|---|---|---|---|
CCDS | 996 | — | — | [1] | 2016-09-08 |
HGNC | 1,007 | 422 | 736 | [7] | 2017-05-12 |
Ensembl | 1,038 | 985 | 800 | [8] | 2017-03-29 |
UniProt | 1,111 | — | — | [9] | 2018-02-28 |
NCBI | 1,053 | 1,188 | 911 | [10] [11] [12] | 2017-05-19 |
The following is a partial list of genes on human chromosome 6. For complete list, see the link in the infobox on the right.
The following are some of the genes located on p-arm (short arm) of human chromosome 6:
The following are some of the genes located on q-arm (long arm) of human chromosome 6:
The following diseases are some of those related to genes on chromosome 6:
Chr. | Arm [20] | Band [21] | ISCN start [22] | ISCN stop [22] | Basepair start | Basepair stop | Stain [23] | Density |
---|---|---|---|---|---|---|---|---|
6 | p | 25.3 | 0 | 118 | 1 | 2,300,000 | gneg | |
6 | p | 25.2 | 118 | 207 | 2,300,001 | 4,200,000 | gpos | 25 |
6 | p | 25.1 | 207 | 355 | 4,200,001 | 7,100,000 | gneg | |
6 | p | 24.3 | 355 | 548 | 7,100,001 | 10,600,000 | gpos | 50 |
6 | p | 24.2 | 548 | 592 | 10,600,001 | 11,600,000 | gneg | |
6 | p | 24.1 | 592 | 740 | 11,600,001 | 13,400,000 | gpos | 25 |
6 | p | 23 | 740 | 844 | 13,400,001 | 15,200,000 | gneg | |
6 | p | 22.3 | 844 | 1185 | 15,200,001 | 25,200,000 | gpos | 75 |
6 | p | 22.2 | 1185 | 1348 | 25,200,001 | 27,100,000 | gneg | |
6 | p | 22.1 | 1348 | 1585 | 27,100,001 | 30,500,000 | gpos | 50 |
6 | p | 21.33 | 1585 | 1718 | 30,500,001 | 32,100,000 | gneg | |
6 | p | 21.32 | 1718 | 1836 | 32,100,001 | 33,500,000 | gpos | 25 |
6 | p | 21.31 | 1836 | 2162 | 33,500,001 | 36,600,000 | gneg | |
6 | p | 21.2 | 2162 | 2310 | 36,600,001 | 40,500,000 | gpos | 25 |
6 | p | 21.1 | 2310 | 2755 | 40,500,001 | 46,200,000 | gneg | |
6 | p | 12.3 | 2755 | 3080 | 46,200,001 | 51,800,000 | gpos | 100 |
6 | p | 12.2 | 3080 | 3140 | 51,800,001 | 53,000,000 | gneg | |
6 | p | 12.1 | 3140 | 3377 | 5,300,0001 | 57,200,000 | gpos | 100 |
6 | p | 11.2 | 3377 | 3421 | 57,200,001 | 58,500,000 | gneg | |
6 | p | 11.1 | 3421 | 3554 | 58,500,001 | 59,800,000 | acen | |
6 | q | 11.1 | 3554 | 3658 | 59,800,001 | 62,600,000 | acen | |
6 | q | 11.2 | 3658 | 3732 | 62,600,001 | 62,700,000 | gneg | |
6 | q | 12 | 3732 | 4147 | 62,700,001 | 69,200,000 | gpos | 100 |
6 | q | 13 | 4147 | 4324 | 69,200,001 | 75,200,000 | gneg | |
6 | q | 14.1 | 4324 | 4621 | 75,200,001 | 83,200,000 | gpos | 50 |
6 | q | 14.2 | 4621 | 4709 | 83,200,001 | 84,200,000 | gneg | |
6 | q | 14.3 | 4709 | 4917 | 84,200,001 | 87,300,000 | gpos | 50 |
6 | q | 15 | 4917 | 5228 | 87,300,001 | 92,500,000 | gneg | |
6 | q | 16.1 | 5228 | 5613 | 92,500,001 | 98,900,000 | gpos | 100 |
6 | q | 16.2 | 5613 | 5687 | 98,900,001 | 100,000,000 | gneg | |
6 | q | 16.3 | 5687 | 5983 | 10,000,0001 | 105,000,000 | gpos | 100 |
6 | q | 21 | 5983 | 6531 | 10,500,0001 | 114,200,000 | gneg | |
6 | q | 22.1 | 6531 | 6753 | 114,200,001 | 117,900,000 | gpos | 75 |
6 | q | 22.2 | 6753 | 6872 | 117,900,001 | 118,100,000 | gneg | |
6 | q | 22.31 | 6872 | 7168 | 118,100,001 | 125,800,000 | gpos | 100 |
6 | q | 22.32 | 7168 | 7345 | 125,800,001 | 126,800,000 | gneg | |
6 | q | 22.33 | 7345 | 7642 | 126,800,001 | 130,000,000 | gpos | 75 |
6 | q | 23.1 | 7642 | 7923 | 13,000,0001 | 130,900,000 | gneg | |
6 | q | 23.2 | 7923 | 8145 | 130,900,001 | 134,700,000 | gpos | 50 |
6 | q | 23.3 | 8145 | 8352 | 134,700,001 | 138,300,000 | gneg | |
6 | q | 24.1 | 8352 | 8560 | 138,300,001 | 142,200,000 | gpos | 75 |
6 | q | 24.2 | 8560 | 8708 | 142,200,001 | 145,100,000 | gneg | |
6 | q | 24.3 | 8708 | 8886 | 145,100,001 | 148,500,000 | gpos | 75 |
6 | q | 25.1 | 8886 | 9078 | 148,500,001 | 152,100,000 | gneg | |
6 | q | 25.2 | 9078 | 9241 | 152,100,001 | 155,200,000 | gpos | 50 |
6 | q | 25.3 | 9241 | 9596 | 155,200,001 | 160,600,000 | gneg | |
6 | q | 26 | 9596 | 9774 | 160,600,001 | 164,100,000 | gpos | 50 |
6 | q | 27 | 9774 | 10100 | 164,100,001 | 170,805,979 | gneg |
Chromosome 21 is one of the 23 pairs of chromosomes in humans. Chromosome 21 is both the smallest human autosome and chromosome, with 46.7 million base pairs representing about 1.5 percent of the total DNA in cells. Most people have two copies of chromosome 21, while those with three copies of chromosome 21 have Down syndrome.
Chromosome 1 is the designation for the largest human chromosome. Humans have two copies of chromosome 1, as they do with all of the autosomes, which are the non-sex chromosomes. Chromosome 1 spans about 249 million nucleotide base pairs, which are the basic units of information for DNA. It represents about 8% of the total DNA in human cells.
Chromosome 13 is one of the 23 pairs of chromosomes in humans. People normally have two copies of this chromosome. Chromosome 13 spans about 113 million base pairs and represents between 3.5 and 4% of the total DNA in cells.
Chromosome 22 is one of the 23 pairs of chromosomes in human cells. Humans normally have two copies of chromosome 22 in each cell. Chromosome 22 is the second smallest human chromosome, spanning about 51 million DNA base pairs and representing between 1.5 and 2% of the total DNA in cells.
Chromosome 2 is one of the twenty-three pairs of chromosomes in humans. People normally have two copies of this chromosome. Chromosome 2 is the second-largest human chromosome, spanning more than 242 million base pairs and representing almost eight percent of the total DNA in human cells.
Chromosome 3 is one of the 23 pairs of chromosomes in humans. People normally have two copies of this chromosome. Chromosome 3 spans more than 198 million base pairs and represents about 6.5 percent of the total DNA in cells.
Chromosome 4 is one of the 23 pairs of chromosomes in humans. People normally have two copies of this chromosome. Chromosome 4 spans more than 190 million base pairs and represents between 6 and 6.5 percent of the total DNA in cells.
Chromosome 5 is one of the 23 pairs of chromosomes in humans. People normally have two copies of this chromosome. Chromosome 5 spans about 182 million base pairs and represents almost 6% of the total DNA in cells. Chromosome 5 is the 5th largest human chromosome, yet has one of the lowest gene densities. This is partially explained by numerous gene-poor regions that display a remarkable degree of non-coding and syntenic conservation with non-mammalian vertebrates, suggesting they are functionally constrained.
Chromosome 8 is one of the 23 pairs of chromosomes in humans. People normally have two copies of this chromosome. Chromosome 8 spans about 146 million base pairs and represents between 4.5 and 5.0% of the total DNA in cells.
Chromosome 9 is one of the 23 pairs of chromosomes in humans. Humans normally have two copies of this chromosome, as they normally do with all chromosomes. Chromosome 9 spans about 138 million base pairs of nucleic acids and represents between 4.0 and 4.5% of the total DNA in cells.
Chromosome 10 is one of the 23 pairs of chromosomes in humans. People normally have two copies of this chromosome. Chromosome 10 spans about 134 million base pairs and represents between 4 and 4.5 percent of the total DNA in cells.
Chromosome 11 is one of the 23 pairs of chromosomes in humans. Humans normally have two copies of this chromosome. Chromosome 11 spans about 135 million base pairs and represents between 4 and 4.5 percent of the total DNA in cells. The shorter arm is termed 11p while the longer arm is 11q. At about 21.5 genes per megabase, chromosome 11 is one of the most gene-rich, and disease-rich, chromosomes in the human genome.
Chromosome 12 is one of the 23 pairs of chromosomes in humans. People normally have two copies of this chromosome. Chromosome 12 spans about 133 million base pairs and represents between 4 and 4.5 percent of the total DNA in cells.
Chromosome 14 is one of the 23 pairs of chromosomes in humans. People normally have two copies of this chromosome. Chromosome 14 spans about 107 million base pairs and represents between 3 and 3.5% of the total DNA in cells.
Chromosome 15 is one of the 23 pairs of chromosomes in humans. People normally have two copies of this chromosome. Chromosome 15 spans about 99.7 million base pairs and represents between 3% and 3.5% of the total DNA in cells. Chromosome 15 is an acrocentric chromosome, with a very small short arm, which contains few protein coding genes among its 19 million base pairs. It has a larger long arm that is gene rich, spanning about 83 million base pairs.
Chromosome 16 is one of the 23 pairs of chromosomes in humans. People normally have two copies of this chromosome. Chromosome 16 spans about 90 million base pairs and represents just under 3% of the total DNA in cells.
Chromosome 17 is one of the 23 pairs of chromosomes in humans. People normally have two copies of this chromosome. Chromosome 17 spans more than 84 million base pairs and represents between 2.5 and 3% of the total DNA in cells.
Chromosome 18 is one of the 23 pairs of chromosomes in humans. People normally have two copies of this chromosome. Chromosome 18 spans about 80 million base pairs and represents about 2.5 percent of the total DNA in cells.
Chromosome 19 is one of the 23 pairs of chromosomes in humans. People normally have two copies of this chromosome. Chromosome 19 spans more than 61.7 million base pairs, the building material of DNA. It is considered the most gene-rich chromosome containing roughly 1,500 genes, despite accounting for only 2 percent of the human genome.
Chromosome 20 is one of the 23 pairs of chromosomes in humans. Chromosome 20 spans around 66 million base pairs and represents between 2 and 2.5 percent of the total DNA in cells. Chromosome 20 was fully sequenced in 2001 and was reported to contain over 59 million base pairs. Since then, due to sequencing improvements and fixes, the length of chromosome 20 has been updated to just over 66 million base pairs.