SpeciesHomo sapiens
Species subgroup
Subgroup type
Sequence NameIGHV4-61*i04
Alternative names
Affirmation Level1
Full Sequence
Coding Sequence
Inference TypeRearranged Only
Paralog RepFalse

Observations in VDJbase

Inferred sequences in VDJbase that match this sequence:

VDJbase Allele NameSubjectsSequence Match
IGHV4-61*01_a41g 1

Un-rearranged Observations

Un-rearranged sequence observations that support this sequence:


CDR delineation

CDR1 Start76
CDR1 End105
CDR2 Start157
CDR2 End177
CDR3 Start292


3' ExtensionA
3' start
3' end

Additional Information

Sequence IDA02567
CuratorWilliam Lees
Curator addressBirkbeck College, University of London, Malet Street, London
Release Date2023-07-10
Release Notes

Bulk upload of sequences for the AIRR-C Human IG germline sets

Sequence TypeV
Gene Subgroup4
Gene Designation61
Allele Designationi04


Individuals acknowledged as contributing to this sequence:

No Items


Notes are added by IARC reviewers.

The inference of IGHV4-61*01_A41G was considered at IARC meeting 116 on Feb 27th, 2023.

IGHV4-61*01_A41G has been inferred in one genotype (P1_I23) in VDJbase P1 data set. The genotype also carries IGHV4-61*01. IGHV4-61*01_A41G represents 0.32% of the total unmutated population. It is represented by 91 unmutated error-free sequences and 91 unique CDR3s of different lengths in the error-free set. Haplotyping based on allelic diversity in IGHJ6 demonstrates association of the haplotype defined by IGHJ6*02 (100:0 ratio) (IGHV4-61*01 shows a haplotype ratio of 7:93).

Other genes carry alleles defined by IMGT, alleles that are highly similar to IGHV4-61*01 A41G. These genes include IGHV4-59 and IGHV4-4 (>97% sequence identity). In no case do these alleles carry the A41G SNP.

IARC affirms the sequence as IGHV4-61*i04 at Level 1 up to and including base 319. It is acknowledged that the allele most likely carries 1 additional base, typically A, at base positions 320. Trailing “.” indicates IARC’s opinion that the sequence is likely to contain additional 3’-nucleotides for which there is insufficient evidence to make an affirmation. For use in a reference germline gene set, IARC recommends the use of the expected full length sequence.


The locus on chromosome 14 that carries human IGHV genes is highly complex. Genes may be duplicated or deleted, and identical sequences may be found in more than one gene. The name (with an “i” allele designation) of an inferred allele does not imply that its precise genetic location is known. It just relates to the most similar allele presently found in the IMGT database, or to the gene with the lowest alphanumeric value, should alleles of multiple genes be equally matched to the novel allele in question. Other similar genes have been mentioned above.

Additional information for this sequence was imported into OGRDB via bulk update with the following notes:
Sequence annotation is based on Genbank sample OX384050


No Items


History logs the times and reasons for the publication of each version of this sequence.

Mats Ohlin
2023-03-20 08:45:34
Version 1 published

Published by IARC on March 20th, 2023.

William Lees
2023-07-10 11:24:42
Version 2 published

Bulk upload of sequences for the AIRR-C Human IG germline sets

Changes from previous version

CuratorMats OhlinWilliam Lees
Curator addressDept. of Immunotechnology, Lund University, Medicon Village building 406, S-22381 Lund, SwedenBirkbeck College, University of London, Malet Street, London
Inference TypeRearrangedRearranged Only
Subgroup typenone
Full Sequence
Codon Frame1
Paralog RepFalse
3' ExtensionA
5' Extension


All published versions of this sequence.

Sequence NameIMGT NameVersionDate