I wonder if there are any online databases/tools to type the HLA genes in 4-digit format when I submit a few hundred to a few thousand bases of an HLA gene sequence? For example, I have a portion of HLA-A gene that goes "GTTCTCACACCATCCAGATAATGTATGGCTGCGACGTGGGGTCGGACGGGCGCTTCCTCCGCGGGTACCGGCAGGACGCCTACGACGGCAAGGATTACATCGCCCTGAACGAGGACCTGCGCTCTTGGACCGCGGCGGACATGGCGGCTCAGATCACCAAGCGCAAGTGGGAGGCGGCCCATGAGGCGGAGCAGTTGAGAGCCTACCTGGATGGCACGTGCGTGGAGTGGCTCCGCAGATACCTGGAGAACGGGAAGGAGACGCTGCAGCGCACGGGTACCAGGGGCCACGGGGCGCCTCCCTGATCGCCTGTAGATCTCCCGGGCTGGCCTCCCACAAGGAGGGGAGACAATTGGGACCAACACTAGAATATCACCCTCCCTCTGGTCCTGAGGGAGAGGAATCCTCCTGGGTTCCAGATCCTGTACCAGAGAGTGACTCTGAGGTTCCGCCCTGCTCTCTGACACAATTAAGGGATAAAATCTCTGAAGGAGTGACGGGAAGACGATCCCTCGAATACTGATGAGTGGTTCCCTTTGACACCGGCAGCAGCCTTGGGCCCGTGACTTTTCCTCTCAGGCCTTGTTCTCTGCTTCACA", how can I tell what HLA-A type it may belong to (in this particular case, it is HLA-A0301)? Many thanks!
Hi,
pls use IMGT/HLA website (https://www.ebi.ac.uk/ipd/imgt/hla/) for sequence based HLA typing. Choose the parameters, submit your sequence. Based on homology, u can determine the HLA allele
all the best
Dear Yongjiang,
What kind of DNA sequence is this?
Is this a genomic or a cDNA sequence?
Are you sure, that this is a HLA-A sequence?
Where your sequence comes from?
To identify the possible HLA-A allele (an HLA class I allele) you need at least the sequences of exon 2 and exon 3.
HLA typing is not so easy as you think!
Best regards,
Thomas
Dear Thomas,
Thank you for taking time to answer my question by returning many questions without any suggestive remarks! I hope your answer wouldn't deter people from asking possible "stupid" questions here on RG. :)
I'm sorry for providing a less-than-ideal example in my question. I purposely gave a shorter sequence to see if there are any databases that could tell all the possible alleles there are when inadequate sequence info was obtained. Sometimes a less-than-ideal example would give more info on how good a search engine can be.
The website Dr. Kalyanaraman gave here, IMGT/HLA (https://www.ebi.ac.uk/ipd/imgt/hla/) , works very well in giving many possible HLA-A allele candidates, so I will recommend Dr. Kalyanaraman's answer and the website that she gave.
Lastly, the full genomic DNA sequence I found online (which contains the short sequence example in my initial question) goes "
>HLA:HLA00037 A*03:01:01:01 3502 bp
CAGGAGCAGAGGGGTCAGGGCGAAGTCCCAGGGCCCCAGGCGTGGCTCTCAGAGTCTCAGGCCCCGAAGGCGGTGTATGGATTGGGGAGTCCCAGCCTTGGGGATTCCCCAACTCCGCAGTTTCTTTTCTCCCTCTCCCAACCTACGTAGGGTCCTTCATCCTGGATACTCACGACGCGGACCCAGTTCTCACTCCCATTGGGTGTCGGGTTTCCAGAGAAGCCAATCAGTGTCGTCGCGGTCGCTGTTCTAAAGCCCGCACGCACCCACCGGGACTCAGATTCTCCCCAGACGCCGAGGATGGCCGTCATGGCGCCCCGAACCCTCCTCCTGCTACTCTCGGGGGCCCTGGCCCTGACCCAGACCTGGGCGGGTGAGTGCGGGGTCGGGAGGGAAACCGCCTCTGCGGGGAGAAGCAAGGGGCCCTCCTGGCGGGGGCGCAGGACCGGGGGAGCCGCGCCGGGACGAGGGTCGGGCAGGTCTCAGCCACTGCTCGCCCCCAGGCTCCCACTCCATGAGGTATTTCTTCACATCCGTGTCCCGGCCCGGCCGCGGGGAGCCCCGCTTCATCGCCGTGGGCTACGTGGACGACACGCAGTTCGTGCGGTTCGACAGCGACGCCGCGAGCCAGAGGATGGAGCCGCGGGCGCCGTGGATAGAGCAGGAGGGGCCGGAGTATTGGGACCAGGAGACACGGAATGTGAAGGCCCAGTCACAGACTGACCGAGTGGACCTGGGGACCCTGCGCGGCTACTACAACCAGAGCGAGGCCGGTGAGTGACCCCGGCCGGGGGCGCAGGTCAGGACCCCTCATCCCCCACGGACGGGCCAGGTCGCCCACAGTCTCCGGGTCCGAGATCCACCCCGAAGCCGCGGGACCCCGAGACCCTTGCCCCGGGAGAGGCCCAGGCGCCTTTACCCGGTTTCATTTTCAGTTTAGGCCAAAAATCCCCCCGGGTTGGTCGGGGCTGGGCGGGGCTCGGGGGACTGGGCTGACCGCGGGGTCGGGGCCAGGTTCTCACACCATCCAGATAATGTATGGCTGCGACGTGGGGTCGGACGGGCGCTTCCTCCGCGGGTACCGGCAGGACGCCTACGACGGCAAGGATTACATCGCCCTGAACGAGGACCTGCGCTCTTGGACCGCGGCGGACATGGCGGCTCAGATCACCAAGCGCAAGTGGGAGGCGGCCCATGAGGCGGAGCAGTTGAGAGCCTACCTGGATGGCACGTGCGTGGAGTGGCTCCGCAGATACCTGGAGAACGGGAAGGAGACGCTGCAGCGCACGGGTACCAGGGGCCACGGGGCGCCTCCCTGATCGCCTGTAGATCTCCCGGGCTGGCCTCCCACAAGGAGGGGAGACAATTGGGACCAACACTAGAATATCACCCTCCCTCTGGTCCTGAGGGAGAGGAATCCTCCTGGGTTCCAGATCCTGTACCAGAGAGTGACTCTGAGGTTCCGCCCTGCTCTCTGACACAATTAAGGGATAAAATCTCTGAAGGAGTGACGGGAAGACGATCCCTCGAATACTGATGAGTGGTTCCCTTTGACACCGGCAGCAGCCTTGGGCCCGTGACTTTTCCTCTCAGGCCTTGTTCTCTGCTTCACACTCAATGTGTGTGGGGGTCTGAGTCCAGCACTTCTGAGTCCCTCAGCCTCCACTCAGGTCAGGACCAGAAGTCGCTGTTCCCTTCTCAGGGAATAGAAGATTATCCCAGGTGCCTGTGTCCAGGCTGGTGTCTGGGTTCTGTGCTCTCTTCCCCATCCCGGGTGTCCTGTCCATTCTCAAGATGGCCACATGCGTGCTGGTGGAGTGTCCCATGACAGATGCAAAATGCCTGAATTTTCTGACTCTTCCCGTCAGACCCCCCCAAGACACATATGACCCACCACCCCATCTCTGACCATGAGGCCACCCTGAGGTGCTGGGCCCTGGGCTTCTACCCTGCGGAGATCACACTGACCTGGCAGCGGGATGGGGAGGACCAGACCCAGGACACGGAGCTCGTGGAGACCAGGCCTGCAGGGGATGGAACCTTCCAGAAGTGGGCGGCTGTGGTGGTGCCTTCTGGAGAGGAGCAGAGATACACCTGCCATGTGCAGCATGAGGGTCTGCCCAAGCCCCTCACCCTGAGATGGGGTAAGGAGGGAGATGGGGGTGTCATGTCTCTTAGGGAAAGCAGGAGCCTCTCTGGAGACCTTTAGCAGGGTCAGGGCCCCTCACCTTCCCCTCTTTTCCCAGAGCTGTCTTCCCAGCCCACCATCCCCATCGTGGGCATCATTGCTGGCCTGGTTCTCCTTGGAGCTGTGATCACTGGAGCTGTGGTCGCTGCCGTGATGTGGAGGAGGAAGAGCTCAGGTGGAGAAGGGGTGAAGGGTGGGGTCTGAGATTTCTTGTCTCACTGAGGGTTCCAAGCCCCAGCTAGAAATGTGCCCTGTCTCATTACTGGGAAGCACCGTCCACAATCATGGGCCTACCCAGTCTGGGCCCTGTGTGCCAGCACTTACTCTTTTGTAAAGCACCTGTTAAAATGAAGGACAGATTTATCACCTTGATTACGGCGGTGATGGGACCTGATCCCAGCAGTCACAAGTCACAGGGGAAGGTCCCTGAGGACAGACCTCAGGAGGGCTATTGGTCCAGGACCCACACCTGCTTTCTTCATGTTTCCTGATCCCGCCCTGGGTCTGCAGTCACACATTTCTGGAAACTTCTCTGGGGTCCAAGACTAGGAGGTTCCTCTAGGACCTTAAGGCCCTGGCTCCTTTCTGGTATCTCACAGGACATTTTCTTCTCACAGATAGAAAAGGAGGGAGTTACACTCAGGCTGCAAGTAAGTATGAAGGAGGCTGATGCCTGAGGTCCTTGGGATATTGTGTTTGGGAGCCCATGGGGGAGCCCACCCACCTCACAATTCCTCCTCTAGCCACATCTTCTGTGGGATCTGACCAGGTTCTGTTTTTGTTCTACCCCAGGCAGTGACAGTGCCCAGGGCTCTGATGTGTCCCTCACAGCTTGTAAAGGTGAGAGCTTGGAGGACCTAATGTGTGTTGGGTGTTGGGCGGAACAGTGGACACAGCTGTGCTATGGGGTTTCTTTGCATTGGATGTATTGAGCATGCGATGGGCTGTTTAAGGTGTGACCCCTCACTGTGATGGATATGAATTTGTTCATGAATATTTTTTTCTATAGTGTGAGACAGCTGCCTTGTGTGGGACTGAGAGGCAAGAGTTGTTCCTGCCCTTCCCTTTGTGACTTGAAGAACCCTGACTTTGTTTCTGCAAAGGCACCTGCATGTGTCTGTGTTCGTGTAGGCATAATGTGAGGAGGTGGGGAGACCACCCCACCCCCATGTCCACCATGACCCTCTTCCCACGCTGACCTGTGCTCCCTCCCCAATCATCTTTCCTGTTCCAGAGAGGTGGGGCTGAGGTGTCTCCATCTCTGTCTCAACTTCATGGTGCACTGAGCTGTAACTTCTTCCTTCCCTATTAAAA".
Best regards,
Dear Yongjiang,
Good luck, for finding your partial example sequence with the help of this well known HLA data base!
A lot of HLA-A alleles will contain your example sequence.
Best regards,
Thomas
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