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Protein

Immunoglobulin heavy variable 4-30-2

Gene

IGHV4-30-2

Organism
Homo sapiens (Human)
Status
Reviewed-Annotation score: Annotation score: 4 out of 5-Protein inferred from homologyi

Functioni

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:22158414, PubMed:20176268). 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:20176268, PubMed:17576170).4 Publications

GO - Molecular functioni

GO - Biological processi

Keywordsi

Biological processAdaptive immunity, Immunity

Protein family/group databases

IMGT/GENE-DBIGHV4-30-2.

Names & Taxonomyi

Protein namesi
Recommended name:
Immunoglobulin heavy variable 4-30-22 Publications
Gene namesi
Name:IGHV4-30-22 Publications
OrganismiHomo sapiens (Human)
Taxonomic identifieri9606 [NCBI]
Taxonomic lineageiEukaryotaMetazoaChordataCraniataVertebrataEuteleostomiMammaliaEutheriaEuarchontogliresPrimatesHaplorrhiniCatarrhiniHominidaeHomo
Proteomesi
  • UP000005640 Componenti: Unplaced

Organism-specific databases

EuPathDBiHostDB:ENSG00000231475.3.
HGNCiHGNC:5647. IGHV4-30-2.

Subcellular locationi

Extracellular region or secreted Cytosol Plasma membrane Cytoskeleton Lysosome Endosome Peroxisome ER Golgi apparatus Nucleus Mitochondrion Manual annotation Automatic computational assertionGraphics by Christian Stolte; Source: COMPARTMENTS

Keywords - Cellular componenti

Cell membrane, Membrane, Secreted

Pathology & Biotechi

Organism-specific databases

OpenTargetsiENSG00000231475.

PTM / Processingi

Molecule processing

Feature keyPosition(s)DescriptionActionsGraphical viewLength
Signal peptidei1 – 19Sequence analysisAdd BLAST19
ChainiPRO_500738044720 – 118Immunoglobulin heavy variable 4-30-2Sequence analysisAdd BLAST99

Amino acid modifications

Feature keyPosition(s)DescriptionActionsGraphical viewLength
Disulfide bondi41 ↔ 116PROSITE-ProRule annotation

Keywords - PTMi

Disulfide bond

Proteomic databases

PeptideAtlasiA0A087WSY4.

Expressioni

Gene expression databases

BgeeiENSG00000231475.

Interactioni

Subunit structurei

Immunoglobulins are composed of two identical heavy chains and two identical light chains; disulfide-linked.1 Publication

GO - Molecular functioni

Structurei

3D structure databases

ProteinModelPortaliA0A087WSY4.
SMRiA0A087WSY4.
ModBaseiSearch...
MobiDBiSearch...

Family & Domainsi

Domains and Repeats

Feature keyPosition(s)DescriptionActionsGraphical viewLength
Domaini20 – ›118Ig-likePROSITE-ProRule annotationAdd BLAST›99

Keywords - Domaini

Immunoglobulin domain, Immunoglobulin V region, Signal

Phylogenomic databases

GeneTreeiENSGT00900000141309.
OMAiTERQTEW.

Family and domain databases

Gene3Di2.60.40.10. 1 hit.
InterProiView protein in InterPro
IPR007110. Ig-like_dom.
IPR036179. Ig-like_dom_sf.
IPR013783. Ig-like_fold.
IPR013106. Ig_V-set.
PfamiView protein in Pfam
PF07686. V-set. 1 hit.
SMARTiView protein in SMART
SM00406. IGv. 1 hit.
SUPFAMiSSF48726. SSF48726. 1 hit.
PROSITEiView protein in PROSITE
PS50835. IG_LIKE. 1 hit.

Sequencei

Sequence statusi: Complete.

Sequence processingi: The displayed sequence is further processed into a mature form.

A0A087WSY4-1 [UniParc]FASTAAdd to basket

« Hide

        10         20         30         40         50
MKHLWFFLLL VAAPRWVLSQ LQLQESGSGL VKPSQTLSLT CAVSGGSISS
60 70 80 90 100
GGYSWSWIRQ PPGKGLEWIG YIYHSGSTYY NPSLKSRVTI SVDRSKNQFS
110
LKLSSVTAAD TAVYYCAR
Length:118
Mass (Da):13,025
Last modified:October 29, 2014 - v1
Checksum:iDE2726740E2C4F47
GO

Experimental Info

Feature keyPosition(s)DescriptionActionsGraphical viewLength
Non-terminal residuei1181

Polymorphismi

There are several alleles. The sequence shown is that of IMGT allele IGHV4-30-2*01.Curated

Sequence databases

Select the link destinations:
EMBLi
GenBanki
DDBJi
Links Updated
AC245166 Genomic DNA. No translation available.
UniGeneiHs.510635.

Genome annotation databases

UCSCiuc059ggg.1. human.

Keywords - Coding sequence diversityi

Polymorphism

Similar proteinsi

Entry informationi

Entry nameiHV432_HUMAN
AccessioniPrimary (citable) accession number: A0A087WSY4
Entry historyiIntegrated into UniProtKB/Swiss-Prot: April 12, 2017
Last sequence update: October 29, 2014
Last modified: October 25, 2017
This is version 21 of the entry and version 1 of the sequence. See complete history.
Entry statusiReviewed (UniProtKB/Swiss-Prot)
Annotation programChordata Protein Annotation Program
DisclaimerAny medical or genetic information present in this entry is provided for research, educational and informational purposes only. It is not in any way intended to be used as a substitute for professional medical advice, diagnosis, treatment or care.

Miscellaneousi

Caution

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

Keywords - Technical termi

Complete proteome, Reference proteome

Documents

  1. Human chromosome 14
    Human chromosome 14: entries, gene names and cross-references to MIM