Gene
HLA-DMA
major histocompatibility complex, class II, DM alpha
- HGNC 4934↗(opens in a new tab)
- Ensembl gene ENSG00000204257↗(opens in a new tab)
- NCBI Gene 3108↗(opens in a new tab)
Summary
- Cytogenetic location
- 6p21.32
- Coordinates
- Chromosome 6: 32,948,618–32,953,097 (GRCh38)
- Exons
- 5 exons across 4.5 kb
- Protein
- 261 amino acids
- Also known as
- D6S222E, RING6
- MANE Select transcript
- ENST00000374843.9NM_006120.4
- Locus type
- Protein-coding
- Very high
- Confident
- Low
- Very low
This page as data
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No Genome Test report reads HLA-DMA yet. The test sequences your whole genome, so your data includes it all the same.
How HLA-DMA is laid out
- Coding sequence
- Untranslated region
- Intron
- Direction of transcription
- Stretches short reads find hard
Exons of the gene's MANE Select transcript (release v1.5), from NCBI and EMBL-EBI, on the GRCh38 reference genome.
Chromosome bands from UCSC's GRCh38 ideogram (2022-10-29).
Nearby genes from Ensembl release 116, on GRCh38.
Exons make up 1.1 kb of the gene's 4.5 kb; 786 of those bases code for the protein.
Sequencing HLA-DMA
1Easy
How hard HLA-DMA is to sequence with short reads, out of 100
0 · Easy100 · Hard
Almost all of HLA-DMA's exons sit where short reads map cleanly.
What adds to it: the share of HLA-DMA's exons in each kind of hard region
- MappabilityStretches where 100 or 250 bp reads cannot be placed uniquely, so a call there may be missing or wrong. On its own, a gene wholly in this kind of region would score 100.0%
- HomologySegmental duplications: copies elsewhere in the genome, such as paralogues and pseudogenes, at 90% identity or more. On its own, a gene wholly in this kind of region would score 60.0%
- Shared with chrYThe pseudoautosomal regions and the X-transposed region, where chrX and chrY carry the same or nearly the same sequence, so a read from one may be placed on the other. On its own, a gene wholly in this kind of region would score 60.0%
- Reference coverageGaps in the reference assembly nearby, where there is no sequence for reads to align to. On its own, a gene wholly in this kind of region would score 50.0%
- RepeatsTandem repeats and runs of one base, which reads slip on and may not span. On its own, a gene wholly in this kind of region would score 30.1.8%
- GC contentWindows under 25% or over 65% G and C, which library preparation covers thinly. On its own, a gene wholly in this kind of region would score 20.0%
A Dante Labs score from our own research, built on NIST's Genome in a Bottle maps of hard-to-sequence regions.How it's scoredEach bar is the share of HLA-DMA's exon bases in that kind of difficult region. Any one kind can make a gene hard on its own, and each further kind adds less: 0 when no base is in any, 100 when every base is where reads cannot be placed uniquely.
External links
Gene records
Transcript
Protein
Where this comes from
- HGNC: the gene's symbol, name, other symbols and location.
- MANE Select v1.5, from NCBI and EMBL-EBI: the transcript, its exons and coding sequence.
- The Genome in a Bottle genome stratifications, from NIST: the sequencing difficulty score.
Cite this page
Dante Labs. (n.d.). HLA-DMA gene: major histocompatibility complex, class II, DM alpha. Retrieved 20 October 2026, from https://dantelabs.com/genes/hla-dma
Dante Labs. HLA-DMA gene: major histocompatibility complex, class II, DM alpha [Internet]. [cited 20 October 2026]. Available from: https://dantelabs.com/genes/hla-dma
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