Citing IMGT dynamic tools: Sanou G., Zeitoun G. et al. IMGT® at scale: FAIR, Dynamic and Automated Tools for Immune Locus Analysis, Nucleic Acids Research. 2025;,gkaf1024. doi: 10.1093/nar/gkaf1024 (Free Article) PMID: 41091930.
Program version: v. 

Add information about removed genes/alleles.
May 15th, 2025.

Add the possibility to obtain a gene table per strain (for mouse now and for other species later) and allotypes/isotypes for human.
September 25th, 2024.

Bibliographical references in alphabetic order, small design changes and addition of "NL" for non-localized gene.
June 14th, 2024.

Addition of 'Score for IMGT allele confirmation' as well as NCBI TPA accession numbers.
September 20th, 2023.

Implementation of the dynamic gene table.

Gene table legend:

"+" or "-" indicates if the gene sequences have been found (+) or not been found (-) rearranged (R), transcribed (T) and/or translated into protein (Pr). Arbitrarily that information is shown on the first line of each gene, when the data have been confirmed by several studies.

Functionality is shown in parentheses, (F) and (P), when the accession number refers to rearranged genomic DNA or cDNA and the corresponding germline gene has not yet been isolated.

IMGT allele confirmation: A scoring system is employed to indicate the number of IMGT/LIGM-DB reference sequences and other sequences from the literature in which an IG or TR gene allele has been identified and annotated.

Removed genes/alleles
If a gene/allele existence or name has to be changed, the old name or gene/allele would be deleted and its name won't be reused. They are kept in the gene table for historical reasons.
A single star ()
indicates that an IG or TR gene allele is annotated in the reference sequence only.
Two stars ()
indicate that an IG or TR gene allele is annotated in its reference sequence and in one sequence from the literature.
Three stars ()
indicate that an IG or TR gene allele is annotated in its reference sequence and in at least two sequences from the literature.
In the Excel file, the stars are represented by the plus symbol (+).

Click on:
  • IMGT gene name to get the corresponding IMGT/GENE-DB entry (link).
  • IMGT allele name to see the corresponding Alignments of alleles (link).
  • Accession number to get the corresponding IMGT/LIGM-DB entry (link).
  • MAP: mapped sequences. Click to access GENE-DB «LOCALIZATION IN GENOME ASSEMBLIES» (link).
  • [number] to access the corresponding IMGT reference (popover).
  • (number) to see the corresponding IMGT note (popover).
Options:
  • You can show/hide columns (), download data () or put the table in fullscreen () using buttons.
See also (IMGT Scientific chart):
Select a species and a IMGT group to get the gene table:
Only IMGT available species/group are shown in the drop-down list.
The gene table can take several seconds to appear, please be patient.
Gene table of human (Homo sapiens) TRAC IMGT group:
IMGT gene nameIMGT allele nameScore for
IMGT allele
confirmation		FctChromosomosal
localization		ExonsR T PrIMGT/LIGM-DB reference sequencesIMGT/LIGM-DB sequences from the literature
Clone namesAccession
numbers		Positions
in the sequence		Secondary
accession
numbers		Clone namesAccession
numbers		Positions
in the sequence
TRAC TRAC*01 F 14q11.2 EX1
R αT αPr αR δT δPr δ
++
 Calpha X02883 [1,9] ° MAP 273-545 AE000662 [2,5] 53594-53866
CM000676.2 IMGT000024 [4,6] 935603-935875
CM089104.1 IMGT000290 [7] 935912-936184
Calpha M14858 [1] (1) ° 8-280
M94081 [5] 87701-87973
Calpha X02592 [8] #c Unknown
TRAC TRAC*01 F 14q11.2 EX2
R αT αPr αR δT δPr δ
++
 Calpha X02883 [1,9] ° MAP 2408-2452 AE000662 [2,5] 55729-55773
CM000676.2 IMGT000024 [4,6] 937735-937779
CM089104.1 IMGT000290 [7] 938049-938093
Calpha M14859 [1] (1) ° 12-56
M94081 [5] 89836-89880
Calpha X02592 [8] #c Unknown
TRAC TRAC*01 F 14q11.2 EX3
R αT αPr αR δT δPr δ
++
 Calpha X02883 [1,9] ° MAP 3324-3431 AE000662 [2,5] 56648-56755
CM000676.2 IMGT000024 [4,6] 938654-938761
CM089104.1 IMGT000290 [7] 938968-939075
Calpha M14860 [1] (1) ° 63-170
M94081 [5] 90755-90858
Calpha X02592 [8] #c Unknown
TRAC TRAC*01 F 14q11.2 EX4UTR (2)
R αT αPr αR δT δPr δ
++
 Calpha X02883 [1,9] ° MAP 4369-4899 AE000662 [2,5] 57697-58222
CM000676.2 IMGT000024 [4,6] 939702-940229
CM089104.1 IMGT000290 [7] 940016-940543
Calpha M14861 [1] (1) ° 35-562
M94081 [5] Unknown
Calpha X02592 [8] #c Unknown
IMGT notes: ↑
  1. From clone lambdaDalpha3 isolated from a B-cell DNA library.
  2. Since EX4UTR is untranslated, nucleotide differences observed in EX4UTR are not taken into account for the description of alleles.
IMGT references: ↑
  1. Baer R. et al., Organization of the T-cell receptor alpha-chain gene and rearrangement in human T-cell leukaemias, Mol. Biol. Med, vol. 3, no. 3, 1986, pp. 265-277. PUBMED: 3016457
  2. Boysen C. et al., Analysis of the 1.1-Mb human alpha/delta T-cell receptor locus with bacterial artificial chromosome clones, Genome Res, vol. 7, no. 4, 1997, pp. 330-338. PUBMED: 9110172
  3. Boysen C. et al., T-Cell Receptor Alpha Delta Locus Complete Nucleotide Sequence, Unpublished.
  4. Heilig R. et al., The DNA sequence and analysis of human chromosome 14, Nature, vol. 421, no. 6923, 2003, pp. 601-607. PUBMED: 12508121
  5. Koop B.F. et al., The human T-cell receptor TCRAC/TCRDC (C alpha/C delta) region: organization, sequence, and evolution of 97.6 kb of DNA, Genomics, vol. 19, no. 3, 1994, pp. 478-493. DOI: 10.1006/geno.1994.1097
  6. Lander,E.S. et al., Initial sequencing and analysis of the human genome, Nature, vol. 409, no. 6822, 2001, pp. 860-921. PUBMED: 11237011
  7. Liao W.W. et al., A draft human pangenome reference, Nature, vol. 617, no. 7960, 2023, pp. 312-324. PUBMED: 37165242
  8. Rabbitts T.H. et al., The chromosomal location of T-cell receptor genes and a T cell rearranging gene: possible correlation with specific translocations in human T cell leukaemia, EMBO J, vol. 4, no. 6, 1985, pp. 1461-1465. PUBMED: 3875483
  9. Yoshikai Y. et al., Organization and sequences of the variable, joining and constant region genes of the human T-cell receptor alpha-chain, Nature, vol. 316, no. 6031, 1985, pp. 837-840. DOI: 10.1038/316837a0