A0A0C4DH34 · HV428_HUMAN

  • Protein
    Immunoglobulin heavy variable 4-28
  • Gene
    IGHV4-28
  • Status
    UniProtKB reviewed (Swiss-Prot)
  • Amino acids
  • Protein existence
    Evidence at protein level
  • Annotation score
    3/5

Function

function

V region of the variable domain of immunoglobulin heavy chains that participates in the antigen recognition (PubMed:24600447).
Immunoglobulins, also known as antibodies, are membrane-bound or secreted glycoproteins produced by B lymphocytes. In the recognition phase of humoral immunity, the membrane-bound immunoglobulins serve as receptors which, upon binding of a specific antigen, trigger the clonal expansion and differentiation of B lymphocytes into immunoglobulins-secreting plasma cells. Secreted immunoglobulins mediate the effector phase of humoral immunity, which results in the elimination of bound antigens (PubMed:20176268, PubMed:22158414).
The antigen binding site is formed by the variable domain of one heavy chain, together with that of its associated light chain. Thus, each immunoglobulin has two antigen binding sites with remarkable affinity for a particular antigen. The variable domains are assembled by a process called V-(D)-J rearrangement and can then be subjected to somatic hypermutations which, after exposure to antigen and selection, allow affinity maturation for a particular antigen (PubMed:17576170, PubMed:20176268).

Caution

For examples of full-length immunoglobulin heavy chains (of different isotypes) see AC P0DOX2, AC P0DOX3, AC P0DOX4, AC P0DOX5 and AC P0DOX6.

GO annotations

all annotationsall molecular functionvirus receptor activitydna bindingrna bindingcytoskeletal motor activitycatalytic activitygtpase activitystructural molecule activitytransporter activitycytoskeletal protein bindinglipid bindingcyclase activityantioxidant activityoxidoreductase activitytransferase activityhydrolase activitylyase activityisomerase activityligase activityprotein tag activitycargo receptor activityhistone bindingprotein folding chaperonetranslation regulator activitynutrient reservoir activityreceptor ligand activitymolecular transducer activitymolecular adaptor activitytoxin activitycell adhesion mediator activitymolecular function regulator activityvirus coreceptor activitycatalytic activity, acting on a proteincatalytic activity, acting on dnacatalytic activity, acting on rnamolecular carrier activitytranscription regulator activitygeneral transcription initiation factor activitymolecular sensor activitymolecular sequestering activityatp-dependent activityother molecular functionall biological processmitotic cell cyclecytokinesiscytoplasmic translationimmune system processmuscle system processcirculatory system processrenal system processrespiratory system processcarbohydrate metabolic processgeneration of precursor metabolites and energydna replicationdna repairdna recombinationchromatin organizationdna-templated transcriptionregulation of dna-templated transcriptiontrna metabolic processprotein foldingprotein glycosylationamino acid metabolic processmodified amino acid metabolic processlipid metabolic processvitamin metabolic processsulfur compound metabolic processintracellular protein transportnucleocytoplasmic transportautophagyinflammatory responsemitochondrion organizationcytoskeleton organizationmicrotubule-based movementperoxisome organizationlysosome organizationchromosome segregationcell adhesionestablishment or maintenance of cell polarityprogrammed cell deathphotosynthesismrna metabolic processsnrna metabolic processvesicle-mediated transportreproductive processdigestive system processsignalingcell differentiationprotein catabolic processextracellular matrix organizationregulatory ncrna-mediated gene silencingtelomere organizationcell junction organizationwound healingribosome biogenesiscilium organizationanatomical structure developmentcell motilitynervous system processendocrine processprotein maturationtransmembrane transportnucleobase-containing small molecule metabolic processhepaticobiliary system processmembrane organizationprotein-containing complex assemblycell wall organization or biogenesisnitrogen cycle metabolic processprotein localization to plasma membranedefense response to other organismdetoxificationmeiotic nuclear divisionmitotic nuclear divisionmitochondrial gene expressioncarbohydrate derivative metabolic processother biological processall cellular componentnuclear chromosomeextracellular regionextracellular spacecell wallnucleusnuclear envelopenucleoplasmchromosomenucleolusmitochondrionlysosomeendosomevacuoleperoxisomeendoplasmic reticulumgolgi apparatuslipid dropletmicrotubule organizing centercytosolribosomecytoskeletonplasma membraneciliumplastidthylakoidexternal encapsulating structureextracellular matrixcytoplasmic vesicleorganelleother cellular component
Cell color indicative of number of GO terms
AspectTerm
Cellular Componentextracellular region
Cellular Componentimmunoglobulin complex
Cellular Componentplasma membrane
Molecular Functionantigen binding
Biological Processimmunoglobulin mediated immune response

Keywords

Protein family/group databases

Names & Taxonomy

Protein names

  • Recommended name
    Immunoglobulin heavy variable 4-28

Gene names

    • Name
      IGHV4-28

Organism names

  • Taxonomic identifier
  • Taxonomic lineage
    Eukaryota > Metazoa > Chordata > Craniata > Vertebrata > Euteleostomi > Mammalia > Eutheria > Euarchontoglires > Primates > Haplorrhini > Catarrhini > Hominidae > Homo

Accessions

  • Primary accession
    A0A0C4DH34

Proteomes

Organism-specific databases

Subcellular Location

Disease & Variants

Variants

We now provide the "Disease & Variants" viewer in its own tab.

The viewer provides 519 variants from UniProt as well as other sources including ClinVar and dbSNP.

Go to variant viewer

Organism-specific databases

Miscellaneous

Genetic variation databases

PTM/Processing

Features

Showing features for signal, chain, disulfide bond.

TypeIDPosition(s)Description
Signal1-19
ChainPRO_500739217020-117Immunoglobulin heavy variable 4-28
Disulfide bond41↔115

Keywords

Proteomic databases

Expression

Gene expression databases

Organism-specific databases

    • ENSG00000211952Group enriched (intestine, lymphoid tissue, salivary gland, stomach, urinary bladder)

Interaction

Subunit

Immunoglobulins are composed of two identical heavy chains and two identical light chains; disulfide-linked.

Miscellaneous

Family & Domains

Features

Showing features for region, domain.

TypeIDPosition(s)Description
Region20-44Framework-1
Domain20-117Ig-like
Region45-53Complementarity-determining-1
Region54-70Framework-2
Region71-77Complementarity-determining-2
Region78-115Framework-3
Region116-117Complementarity-determining-3

Keywords

Phylogenomic databases

Family and domain databases

Sequence

  • Sequence status
    Complete
  • Sequence processing
    The displayed sequence is further processed into a mature form.
  • Length
    117
  • Mass (Da)
    13,124
  • Last updated
    2015-04-01 v1
  • Checksum
    C08A69C72329723A
MKHLWFFLLLVAAPRWVLSQVQLQESGPGLVKPSDTLSLTCAVSGYSISSSNWWGWIRQPPGKGLEWIGYIYYSGSTYYNPSLKSRVTMSVDTSKNQFSLKLSSVTAVDTAVYYCAR

Features

Showing features for non-terminal residue.

TypeIDPosition(s)Description
Non-terminal residue117

Polymorphism

There are several alleles. The sequence shown is that of IMGT allele IGHV4-28*07.

Keywords

Sequence databases

Nucleotide SequenceProtein SequenceMolecule TypeStatus
AC245166
EMBL· GenBank· DDBJ
-Genomic DNA No translation available.

Genome annotation databases

Similar Proteins

Disclaimer

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