Species subgroup
Subgroup typenone
Sequence NameIGHV3-30*i02
Alternative names
Affirmation Level1
Full Sequence
Coding Sequence
Inference TypeRearranged
Alternative names


The table below lists the submissions, and the inferences within them, on which this published sequence is based. The list may be short when the sequence is first published, containing, for example, reference to just a single submission, but is expected to grow over time as additional inferences are submitted.

'Sequence Match' indicates whether the inference exactly matches the sequence, and clicking on the tick or cross will provide an alignment. Mismatches may be caused, for example, by the inclusion of leader sequences, or nucleotides in the inference which do not in IARC's opinion have sufficient evidence for inclusion in the sequence.

Submission IDAccession NoSubject IDGenotype NameSequence NameSequence Match
S00038 OX384049S66P1_I70_S1IGHV3-30*04_C201T

Supporting Observations

Sequences in other published genotypes which have been identified by IARC and support the inference:

No Items

Observations in VDJbase

Inferred sequences in VDJbase that match this sequence:

No Items

Un-rearranged Observations

Un-rearranged sequence observations that support this sequence:

No Items

Non-Core Regions

UTR 5' Start
UTR 5' End
L-PART1 Start
L-PART2 Start


3' Extension
3' start
3' end
5' start
5' end

Additional Information

Sequence IDA02569
Curator addressDept. of Immunotechnology, Lund University, Medicon Village building 406, S-22381 Lund, Sweden
Release Date2023-03-20
Release Notes

Published by IARC on March 20th, 2023.

Sequence TypeV
Gene Subgroup3
Gene Designation
Allele Designation


Individuals acknowledged as contributing to this sequence:

NameInstitutionORCID ID
William LeesBirkbeck College, University of London, Malet Street, London
Ayelet PeresBar-Ilan University, Ramat-Gan, Israel
Gur YaariBar-Ilan University, Ramat-Gan, Israel


Notes are added by IARC reviewers.

The inference IGHV3-30*i02 was considered at IARC meeting 116 on February 27th, 2023

IGHV3-30*04 C201T has been inferred in one genotype (P1_I70) in VDJbase P1 data set. The genotype also carries related alleles like IGHV3-30-3*01 and IGHV3-30*18. It is represented by 394 error-free sequences and 374 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*03 (99:1 ratio). IGHV3-30-3*01 and IGHV3-30*18 are more abundant but also present on both haplotypes. On the haplotype in question IGHV3-30-3*01, IGHV3-30*18, and inferred IGHV3-30*04 C201T are present at approximately a 2:2:1 ratio.

Inspection of the sequences associated with the inference demonstrates that base 317 is A, not G as implied by the outcome of the inference, demonstrating that IGHV3-30*04 C201T G317A (a sequence identical to IGHV3-30*18 G113C C114T) is the allele in question. A past study has, using IgDiscover v.0.12, inferred IGHV3-30*04 C201T G317A/IGHV3-30*18 G113C C114T in this data set (Huang et al. Front Immunol 12:730105; DOI: 10.3389/fimmu.2021.730105). Upstream regions of these alleles were also inferred in that study. The upstream region of IGHV3-30*04 C201T G317A was identical to that of IGHV3-30*18 but differed in four positions from that of IGHV3-30-3*01.

IARC affirmed the sequence at Level 0 at Meeting 115, to possibly be upgraded to level 1 pending further discussion. IARC now affirms the sequence 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. The trailing “.” indicates IARC’s opinion that the sequence is likely to contain one additional 3’-nucleotide for which there is insufficient evidence to make an affirmation. The GenBank record (OX384049) is publicly available and reports the sequence of IGHV3-30*04 C201T G317A, up to and including base 320. 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 IGHV3-30, IGHV3-30-3, IGHV3-30-5, and IGHV3-33 harbors very similar alleles, some of which are identical. For instance IGHV3-30*18 is found at both IGHV3-30 and IGHV3-30-5 (in that case: IGHV3-30-5*01) and IGHV3-30*04 is also found at IGHV3-30-3 (as IGHV3-30-3*03). Inference does not provide proof of the gene of the inferred allele. The gene of the inferred allele IGHV3-30*04 C201T G317A cannot be defined. Any name (with an “i” allele designation) of an inferred allele does not imply that its precise genetic location is known. It just, according to past practice of IARC, relates to the most similar allele that has previously been recognised, 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.


Supplementary Files
 IGHV3-30*i02_meeting 116.pdf


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

Mats Ohlin
2023-03-20 08:44:27
Version 1 published

Published by IARC on March 20th, 2023.


All published versions of this sequence.

Sequence NameIMGT NameAlternative namesInference TypeAffirmation LevelSpecies subgroupSubgroup typeVersionDate