Species subgroup
Subgroup type
Sequence NameIGHV4-4*i01
IUIS NameIGHV4-4*03 (now extended)
Alternative names
Affirmation Level1
Full Sequence
Coding Sequence
Inference TypeRearranged Only
Paralog Rep

Un-rearranged Observations

Un-rearranged sequence observations that support this sequence:

No Items

Observations in AIRR-seq Repertoires

Click here to review supporting data in VDJbase.

Clicking the link will take you to VDJbase. Open in a new tab if you want to keep this page open. In VDJbase, click on the count in the Apperances column to see a list of samples in which the sequence was found.

CDR delineation

CDR1 Start
CDR1 End
CDR2 Start
CDR2 End
CDR3 Start


3' Extensiontgcgagag
3' start312
3' end319

Additional Information

Sequence IDA00008
Curator addressSchool of Biotechnology and Biomolecular Sciences, University of New South Wales, Sydney Australia
Release Date2018-12-21
Release Notes

Submission published by IARC on Dec 21, 2018.

Sequence TypeV
Gene Subgroup4
Gene Designation4
Allele Designationi01


Individuals acknowledged as contributing to this sequence:

NameInstitutionORCID ID
Davide BagnaraGenoa University, Department of Experimental Medicine, Laboratory of Molecular Immunology and Oncology, Genoa, Italy


Notes are added by IARC reviewers.

Originally approved by IARC on April 13, 2018.

“The sequence is present at relatively high frequency (0.6%), in the IgDiscover analysis. It was inferred by IgDiscover, TIger and Partis. Haplotype analysis showed two IGHV4-4-like sequences associated with the IGHJ6*02 haplotype – this inference and a second inference that is most similar to IGHV4-4*08. The likely major duplication of B16 is associated with the IGHJ6*03 haplotype. Given the similarities between IGHV4-4*08 and IGHV4-61, and given that this haplotype does not include an IGHV4-61 sequence, the committee concluded that this sequence could be accepted as Level 1. Although in this analysis the sequence was shown to be most similar to IGHV4-4*01, the committee believes that this inference extends the partial sequence IGHV4-4*03.”


No Items


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

Mats Ohlin
2018-12-21 12:16:43
Version 1 published

Submission published by IARC on Dec 21, 2018.


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
IGHV4-4*i01IGHV4-4*03 (now extended)Rearranged Only112018-12-21
IGHV4-4*i01IGHV4-4*03Rearranged Only122019-04-12
IGHV4-4*03IGHV4-4*03IGHV4-4*i01Rearranged Only112957610215417428932023-07-10