Species subgroup
Subgroup typenone
Sequence NameIGHV4-39*i02
IUIS NameIGHV4-39*09
Alternative names
Affirmation Level1
Full Sequence
Coding Sequence
Inference TypeRearranged Only
Paralog Rep

Observations in VDJbase

Inferred sequences in VDJbase that match this sequence:

VDJbase Allele NameSubjectsSequence Match
IGHV4-39*07_c288a 4

Un-rearranged Observations

Un-rearranged sequence observations that support this sequence:

No Items

CDR delineation

CDR1 Start76
CDR1 End105
CDR2 Start157
CDR2 End177
CDR3 Start292

Additional Information

Sequence IDA00071
CuratorMats Ohlin
Curator addressDept. of Immunotechnology, Lund University, Medicon Village building 406, S-22381 Lund, Sweden
Release Date2021-11-01
Release Notes

Submission published by IARC on November 1st, 2021

Sequence TypeV
Gene Subgroup4
Gene Designation39
Allele Designationi02


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.

IARC meeting 63, Nov 24th, 2020:
The meeting considered the inference of the variant IGHV4-39*07_c288a in the VDJbase datasets of sample P1_I29_S1. (It was present in two other VDJbase samples). The sequence was seen in 4.61% of all unmutated rearrangements, with 1201 sequences including 1068 perfect matches to the inferred allele. There was abundant variation in the CDR3 regions of the aligned sequences. IGHV4-39*01 was also present in the genotype, at a similar frequency (4.35% of all unmutated sequences, 1135 sequences, 1009 unmutated sequences). Plots of the final 3’ nucleotides were unavailable. Haplotyping data strongly supported the inference. The sequence was tentatively affirmed as a Level 1 sequence, and the final 3’ nucleotides will be considered at a later date, when terminal nucleotide plots become available, at which time the affirmed sequence will be noted in the IARC minutes.

IARC-meeting 84, Oct 25th, 2021:
IGHV4-39*07_C288A was inferred in subject S29 (VDJ-base: P1_I29_S1). This inference has previously been pre-assessed at IARC meeting 63 ( The genotype also carried IGHV4-39*01. The inference was supported by many sequences (1304) and unmutated sequences (1107) a balanced allelic frequency (52%), a high overall frequency in the unmutated population (5.7%) and many unique CDR3s (1086) in the unmutated sequence set. Haplotyping based on allelic diversity in IGHJ6 was possible and the alleles distributed well between haplotypes (IGHV4-39*07_C288A: 99:1; IGHV4-39*01: 0:100). IARC infers the sequence at level 1 up to and including base 319 in agreement with past practice. It is acknowledged that the allele most likely carry one additional base, typically A at base position 320. The allele is given the name IGHV4-39*i02.

>IGHV4-39*i02 (IGHV4-39*07_C288A)


Supplementary Files


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

Mats Ohlin
2021-11-01 22:50:46
Version 1 published

Submission published by IARC on November 1st, 2021

Mats Ohlin
2021-11-17 15:25:43
IMGT Name updated to IGHV4-39*09

IMGT Name updated.


All published versions of this sequence.

Sequence NameIMGT NameAlternative namesInference TypeAffirmation LevelSpecies subgroupSubgroup typeGene startGene endUTR 5' StartUTR 5' EndL-PART1 StartL-PART1 EndL-PART2 StartL-PART2 EndCDR1 StartCDR1 EndCDR2 StartCDR2 EndCDR3 Startv_rs_startv_rs_endd_rs_3_prime_startd_rs_3_prime_endd_rs_5_prime_startd_rs_5_prime_endj_rs_startj_rs_endCodon FrameVersionDate
IGHV4-39*i02IGHV4-39*09Rearranged Only1none129876105157177292112021-11-01
IGHV4-39*09IGHV4-39*09IGHV4-39*i02Rearranged Only112987610515717729222023-07-10