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Immunoglobulin heavy variable 4-55 (IGHV4-55)
- Target
- IGHV4-55
- Molecular classification
- Immunoglobulin variable region gene, Immunoglobulin superfamily (IgSF), Antibody gene segment (V segment), Other
01
Overview
Immunoglobulin heavy variable 4-55 (IGHV4-55) is a gene segment in the human immunoglobulin heavy chain locus that encodes a distinct variable region used in the assembly of antibody heavy chains. The IGHV4-55 segment belongs to the IGHV4 family of immunoglobulin heavy chain variable genes and contributes, through V(D)J recombination, to the creation of a diverse repertoire of B-cell receptors and antibodies. The IGHV region defines the antigen-binding specificity of antibodies. IGHV4-55 is one of many variable region genes expressed in B lymphocytes, but it is not a therapeutic target itself; rather, its encoded protein can be part of an antibody that targets antigens as part of the normal immune response.
- Other names
- IGHV4554-55PImmunoglobulin alpha chain VH4 variable regionImmunoglobulin heavy chain variable regionIGHV4-55P
02
Mechanism of action
Not applicable; IGHV4-55 is a gene segment contributing to antibody variable regions, not a standalone druggable protein.
03
Biological functions
Antigen recognition as part of immunoglobulin (antibody) moleculesContributing to immune response diversity via V(D)J recombination and somatic hypermutationFormation of the antigen-binding site (paratope) in B-cell receptors and secreted antibodiesOther
04
Disease associations
Other (Not itself causal, but variants/mutations could influence susceptibility to infection, autoimmune response, or antibody responses indirectly through the repertoire of antibodies produced)
05
Safety considerations
None specifically related to IGHV4-55 itself.
06
Interacting drugs
None directly; IGHV4-55 itself is not a direct drug target. (Note: therapeutic antibodies target antigens via their IGHV regions, but the gene product itself is not directly druggable.)
07
Biomarkers
IGHV gene usage patterns (including IGHV4-55) are sometimes used as biomarkers to study B-cell clonal diversity or track immune responses in disease, e.g. in certain lymphoproliferative disorders, but IGHV4-55 specifically is not a common clinical biomarker
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