Skip Header

You are using a version of browser that may not display all the features of this website. Please consider upgrading your browser.
We will be switching to the new UniProt website on Tuesday, June 28. Please explore and share your feedback. Take me to UniProt BETA

UniProtKB - Q8IYV9 (IZUM1_HUMAN)

Entry version 153 (25 May 2022)
Sequence version 2 (18 May 2010)
Previous versions | rss
Add a publicationFeedback
Protein

Izumo sperm-egg fusion protein 1

Gene

IZUMO1

Organism
Homo sapiens (Human)
Status
Reviewed-Annotation score:

Annotation score:5 out of 5

<p>The annotation score provides a heuristic measure of the annotation content of a UniProtKB entry or proteome. This score <strong>cannot</strong> be used as a measure of the accuracy of the annotation as we cannot define the 'correct annotation' for any given protein.<p><a href='/help/annotation_score' target='_top'>More...</a></p>-Experimental evidence at protein leveli <p>This indicates the type of evidence that supports the existence of the protein. Note that the 'protein existence' evidence does not give information on the accuracy or correctness of the sequence(s) displayed.<p><a href='/help/protein_existence' target='_top'>More...</a></p>

<p>This section provides any useful information about the protein, mostly biological knowledge.<p><a href='/help/function_section' target='_top'>More...</a></p>Functioni

Essential sperm cell-surface protein required for fertilization by acting as a ligand for IZUMO1R/JUNO receptor on egg (PubMed:15759005).

The IZUMO1:IZUMO1R/JUNO interaction is a necessary adhesion event between sperm and egg that is required for fertilization but is not sufficient for cell fusion (PubMed:15759005).

The ligand-receptor interaction probably does not act as a membrane 'fusogen' (PubMed:15759005).

1 Publication

Miscellaneous

Izumo is the name of a Japanese shrine to marriage.1 Publication

<p>The <a href="http://www.geneontology.org/">Gene Ontology (GO)</a> project provides a set of hierarchical controlled vocabulary split into 3 categories:<p><a href='/help/gene_ontology' target='_top'>More...</a></p>GO - Molecular functioni

Complete GO annotation on QuickGO ...

GO - Biological processi

Complete GO annotation on QuickGO ...

<p>UniProtKB Keywords constitute a <a href="http://www.uniprot.org/keywords">controlled vocabulary</a> with a hierarchical structure. Keywords summarise the content of a UniProtKB entry and facilitate the search for proteins of interest.<p><a href='/help/keywords' target='_top'>More...</a></p>Keywordsi

Biological processFertilization

Enzyme and pathway databases

Pathway Commons web resource for biological pathway data

More...PathwayCommonsi		Q8IYV9

Reactome - a knowledgebase of biological pathways and processes

More...Reactomei		R-HSA-1300645, Acrosome Reaction and Sperm:Oocyte Membrane Binding

SignaLink: a signaling pathway resource with multi-layered regulatory networks

More...SignaLinki		Q8IYV9

Protein family/group databases

Transport Classification Database

More...TCDBi		8.A.55.1.1, the izumo sperm-egg fusion protein 1 (izumo1) family

<p>This section provides information about the protein and gene name(s) and synonym(s) and about the organism that is the source of the protein sequence.<p><a href='/help/names_and_taxonomy_section' target='_top'>More...</a></p>Names & Taxonomyi

<p>This subsection of the <a href="http://www.uniprot.org/help/names%5Fand%5Ftaxonomy%5Fsection">Names and taxonomy</a> section provides an exhaustive list of all names of the protein, from commonly used to obsolete, to allow unambiguous identification of a protein.<p><a href='/help/protein_names' target='_top'>More...</a></p>Protein namesi
Recommended name:
Izumo sperm-egg fusion protein 1Curated
Alternative name(s):
Oocyte binding/fusion factor1 Publication
Short name:
OBF1 Publication
Sperm-specific protein izumo1 Publication
<p>This subsection of the <a href="http://www.uniprot.org/help/names%5Fand%5Ftaxonomy%5Fsection">Names and taxonomy</a> section indicates the name(s) of the gene(s) that code for the protein sequence(s) described in the entry. Four distinct tokens exist: 'Name', 'Synonyms', 'Ordered locus names' and 'ORF names'.<p><a href='/help/gene_name' target='_top'>More...</a></p>Gene namesi
Name:IZUMO11 PublicationImported
<p>This subsection of the <a href="http://www.uniprot.org/help/names%5Fand%5Ftaxonomy%5Fsection">Names and taxonomy</a> section provides information on the name(s) of the organism that is the source of the protein sequence.<p><a href='/help/organism-name' target='_top'>More...</a></p>OrganismiHomo sapiens (Human)
<p>This subsection of the <a href="http://www.uniprot.org/help/names%5Fand%5Ftaxonomy%5Fsection">Names and taxonomy</a> section shows the unique identifier assigned by the NCBI to the source organism of the protein. This is known as the 'taxonomic identifier' or 'taxid'.<p><a href='/help/taxonomic_identifier' target='_top'>More...</a></p>Taxonomic identifieri9606 [NCBI]
<p>This subsection of the <a href="http://www.uniprot.org/help/names%5Fand%5Ftaxonomy%5Fsection">Names and taxonomy</a> section contains the taxonomic hierarchical classification lineage of the source organism. It lists the nodes as they appear top-down in the taxonomic tree, with the more general grouping listed first.<p><a href='/help/taxonomic_lineage' target='_top'>More...</a></p>Taxonomic lineageiEukaryota › Metazoa › Chordata › Craniata › Vertebrata › Euteleostomi › Mammalia › Eutheria › Euarchontoglires › Primates › Haplorrhini › Catarrhini › Hominidae › Homo
<p>This subsection of the <a href="http://www.uniprot.org/help/names%5Fand%5Ftaxonomy%5Fsection">Names and taxonomy</a> section is present for entries that are part of a <a href="http://www.uniprot.org/proteomes">proteome</a>, i.e. of a set of proteins thought to be expressed by organisms whose genomes have been completely sequenced.<p><a href='/help/proteomes_manual' target='_top'>More...</a></p>Proteomesi
  • UP000005640 <p>A UniProt <a href="http://www.uniprot.org/manual/proteomes%5Fmanual">proteome</a> can consist of several components.<br></br>The component name refers to the genomic component encoding a set of proteins.<p><a href='/help/proteome_component' target='_top'>More...</a></p> Componenti: Chromosome 19

Organism-specific databases

Human Gene Nomenclature Database

More...HGNCi		HGNC:28539, IZUMO1

Online Mendelian Inheritance in Man (OMIM)

More...MIMi		609278, gene

neXtProt; the human protein knowledge platform

More...neXtProti		NX_Q8IYV9

Eukaryotic Pathogen, Vector and Host Database Resources

More...VEuPathDBi		HostDB:ENSG00000182264

<p>This section provides information on the location and the topology of the mature protein in the cell.<p><a href='/help/subcellular_location_section' target='_top'>More...</a></p>Subcellular locationi

Topology

Feature keyPosition(s)DescriptionActionsGraphical viewLength
<p>This subsection of the <a href="http://www.uniprot.org/help/subcellular%5Flocation%5Fsection">'Subcellular location'</a> section describes the subcellular compartment where each non-membrane region of a membrane-spanning protein is found.<p><a href='/help/topo_dom' target='_top'>More...</a></p>Topological domaini22 – 292ExtracellularSequence analysisAdd BLAST271
<p>This subsection of the <a href="http://www.uniprot.org/help/subcellular%5Flocation%5Fsection">'Subcellular location'</a> section describes the extent of a membrane-spanning region of the protein. It denotes the presence of both alpha-helical transmembrane regions and the membrane spanning regions of beta-barrel transmembrane proteins.<p><a href='/help/transmem' target='_top'>More...</a></p>Transmembranei293 – 313HelicalSequence analysisAdd BLAST21
Topological domaini314 – 350CytoplasmicSequence analysisAdd BLAST37

Keywords - Cellular componenti

Cell membrane, Cytoplasmic vesicle, Membrane

<p>This section provides information on the disease(s) and phenotype(s) associated with a protein.<p><a href='/help/pathology_and_biotech_section' target='_top'>More...</a></p>Pathology & Biotechi

Mutagenesis

Feature keyPosition(s)DescriptionActionsGraphical viewLength
<p>This subsection of the <a href="http://www.uniprot.org/manual/pathology%5Fand%5Fbiotech%5Fsection">'Pathology and Biotech'</a> section describes the effect of the experimental mutation of one or more amino acid(s) on the biological properties of the protein.<p><a href='/help/mutagen' target='_top'>More...</a></p>Mutagenesisi71E → A or K: Mildly decreases interaction with IZUMO1R. 1 Publication1
Mutagenesisi148W → A: Abolishes interaction with IZUMO1R. 1 Publication1
Mutagenesisi157H → A: Nearly abolishes interaction with IZUMO1R. 1 Publication1
Mutagenesisi160R → A or E: Nearly abolishes interaction with IZUMO1R. 1 Publication1

Organism-specific databases

DisGeNET

More...DisGeNETi		284359

Open Targets

More...OpenTargetsi		ENSG00000182264

The Pharmacogenetics and Pharmacogenomics Knowledge Base

More...PharmGKBi		PA142671647

Miscellaneous databases

Pharos NIH Druggable Genome Knowledgebase

More...Pharosi		Q8IYV9, Tbio

Genetic variation databases

BioMuta curated single-nucleotide variation and disease association database

More...BioMutai		IZUMO1

Domain mapping of disease mutations (DMDM)

More...DMDMi		296434545

<p>This section describes post-translational modifications (PTMs) and/or processing events.<p><a href='/help/ptm_processing_section' target='_top'>More...</a></p>PTM / Processingi

Molecule processing

Feature keyPosition(s)DescriptionActionsGraphical viewLength
<p>This subsection of the 'PTM / Processing' section denotes the presence of an N-terminal signal peptide.<p><a href='/help/signal' target='_top'>More...</a></p>Signal peptidei1 – 21Sequence analysisAdd BLAST21
<p>This subsection of the 'PTM / Processing' section describes the extent of a polypeptide chain in the mature protein following processing or proteolytic cleavage.<p><a href='/help/chain' target='_top'>More...</a></p>ChainiPRO_000004548222 – 350Izumo sperm-egg fusion protein 1Add BLAST329

Amino acid modifications

Feature keyPosition(s)DescriptionActionsGraphical viewLength
<p>This subsection of the PTM / Processing":/help/ptm_processing_section section describes the positions of cysteine residues participating in disulfide bonds.<p><a href='/help/disulfid' target='_top'>More...</a></p>Disulfide bondi22 ↔ 149Combined sources2 Publications
Disulfide bondi25 ↔ 152Combined sources2 Publications
Disulfide bondi135 ↔ 159Combined sources2 Publications
Disulfide bondi139 ↔ 165Combined sources2 Publications
Disulfide bondi182 ↔ 233PROSITE-ProRule annotationCombined sources2 Publications
<p>This subsection of the <a href="http://www.uniprot.org/help/ptm%5Fprocessing%5Fsection">PTM / Processing</a> section specifies the position and type of each covalently attached glycan group (mono-, di-, or polysaccharide).<p><a href='/help/carbohyd' target='_top'>More...</a></p>Glycosylationi204N-linked (GlcNAc...) asparagineSequence analysis1
<p>This subsection of the 'PTM / Processing' section specifies the position and type of each modified residue excluding <a href="http://www.uniprot.org/manual/lipid">lipids</a>, <a href="http://www.uniprot.org/manual/carbohyd">glycans</a> and <a href="http://www.uniprot.org/manual/crosslnk">protein cross-links</a>.<p><a href='/help/mod_res' target='_top'>More...</a></p>Modified residuei325PhosphoserineBy similarity1

<p>This subsection of the <a href="http://www.uniprot.org/help/ptm%5Fprocessing%5Fsection">PTM/processing</a> section describes post-translational modifications (PTMs). This subsection <strong>complements</strong> the information provided at the sequence level or describes modifications for which <strong>position-specific data is not yet available</strong>.<p><a href='/help/post-translational_modification' target='_top'>More...</a></p>Post-translational modificationi

N-glycosylated. Glycosylation is not essential for fusion and for proper protein trafficking in sperm.By similarity
Phosphorylated. The cytoplasmic C-terminus is phosphorylated and undergoes phosphorylation changes during epididymal transit.By similarity

Keywords - PTMi

Disulfide bond, Glycoprotein, Phosphoprotein

Proteomic databases

MassIVE - Mass Spectrometry Interactive Virtual Environment

More...MassIVEi		Q8IYV9

PaxDb, a database of protein abundance averages across all three domains of life

More...PaxDbi		Q8IYV9

PeptideAtlas

More...PeptideAtlasi		Q8IYV9

PRoteomics IDEntifications database

More...PRIDEi		Q8IYV9

ProteomicsDB: a multi-organism proteome resource

More...ProteomicsDBi		71246 [Q8IYV9-1]
71247 [Q8IYV9-2]

PTM databases

GlyGen: Computational and Informatics Resources for Glycoscience

More...GlyGeni		Q8IYV9, 1 site

iPTMnet integrated resource for PTMs in systems biology context

More...iPTMneti		Q8IYV9

Comprehensive resource for the study of protein post-translational modifications (PTMs) in human, mouse and rat.

More...PhosphoSitePlusi		Q8IYV9

<p>This section provides information on the expression of a gene at the mRNA or protein level in cells or in tissues of multicellular organisms.<p><a href='/help/expression_section' target='_top'>More...</a></p>Expressioni

<p>This subsection of the 'Expression' section provides information on the expression of a gene at the mRNA or protein level in cells or in tissues of multicellular organisms. By default, the information is derived from experiments at the mRNA level, unless specified 'at protein level'.<br></br>Examples: <a href="http://www.uniprot.org/uniprot/P92958#expression">P92958</a>, <a href="http://www.uniprot.org/uniprot/Q8TDN4#expression">Q8TDN4</a>, <a href="http://www.uniprot.org/uniprot/O14734#expression">O14734</a><p><a href='/help/tissue_specificity' target='_top'>More...</a></p>Tissue specificityi

Sperm-specific (at protein level) (PubMed:15759005). Detectable on sperm surface only after the acrosome reaction (PubMed:15759005).1 Publication

Gene expression databases

Bgee dataBase for Gene Expression Evolution

More...Bgeei		ENSG00000182264, Expressed in testis and 106 other tissues

ExpressionAtlas, Differential and Baseline Expression

More...ExpressionAtlasi		Q8IYV9, baseline and differential

Genevisible search portal to normalized and curated expression data from Genevestigator

More...Genevisiblei		Q8IYV9, HS

Organism-specific databases

Human Protein Atlas

More...HPAi		ENSG00000182264, Tissue enriched (testis)

<p>This section provides information on the quaternary structure of a protein and on interaction(s) with other proteins or protein complexes.<p><a href='/help/interaction_section' target='_top'>More...</a></p>Interactioni

<p>This subsection of the <a href="http://www.uniprot.org/help/interaction%5Fsection">'Interaction'</a> section provides information about the protein quaternary structure and interaction(s) with other proteins or protein complexes (with the exception of physiological receptor-ligand interactions which are annotated in the <a href="http://www.uniprot.org/help/function%5Fsection">'Function'</a> section).<p><a href='/help/subunit_structure' target='_top'>More...</a></p>Subunit structurei

Monomer (PubMed:27309808, PubMed:27309818). Monomer, homodimer and homooligomer; depending on the context (By similarity).

Interacts with IZUMO1R/JUNO. IZUMO1 and IZUMO1R/JUNO form a complex with 1:1 stoichiometry (PubMed:27309808, PubMed:27309818). In gamete recognition, IZUMO1R/JUNO first binds to monomeric IZUMO1 (By similarity). The weak, but specific interaction with IZUMO1R/JUNO induces IZUMO1 homodimerization (By similarity). The process follows a tight binding phase where IZUMO1 bends the entire structure towards the sperm membrane side through a thiol-disulfide exchange reaction (By similarity). The molecule no longer binds to IZUMO1R/JUNO and instead binds to a putative second oocyte receptor (By similarity).

Interacts with ACE3 (By similarity).

By similarity2 Publications

<p>This subsection of the '<a href="http://www.uniprot.org/help/interaction%5Fsection">Interaction</a>' section provides information about binary protein-protein interactions. The data presented in this section are a quality-filtered subset of binary interactions automatically derived from the <a href="https://www.ebi.ac.uk/intact/">IntAct database</a>. It is updated at every <a href="http://www.uniprot.org/help/synchronization">UniProt release</a>.<p><a href='/help/binary_interactions' target='_top'>More...</a></p>Binary interactionsi

Hide details

GO - Molecular functioni

Complete GO annotation on QuickGO ...

Protein-protein interaction databases

The Biological General Repository for Interaction Datasets (BioGRID)

More...BioGRIDi		129843, 28 interactors

CORUM comprehensive resource of mammalian protein complexes

More...CORUMi		Q8IYV9

Database of interacting proteins

More...DIPi		DIP-62033N

Protein interaction database and analysis system

More...IntActi		Q8IYV9, 21 interactors

STRING: functional protein association networks

More...STRINGi		9606.ENSP00000327786

Miscellaneous databases

RNAct, Protein-RNA interaction predictions for model organisms.

More...RNActi		Q8IYV9, protein

<p>This section provides information on the tertiary and secondary structure of a protein.<p><a href='/help/structure_section' target='_top'>More...</a></p>Structurei

Secondary structure

1350
Legend: HelixTurnBeta strandPDB Structure known for this area
Show more details

3D structure databases

AlphaFold Protein Structure Database

More...AlphaFoldDBi		Q8IYV9

SWISS-MODEL Repository - a database of annotated 3D protein structure models

More...SMRi		Q8IYV9

Database of comparative protein structure models

More...ModBasei		Search...

Protein Data Bank in Europe - Knowledge Base

More...PDBe-KBi		Search...

<p>This section provides information on sequence similarities with other proteins and the domain(s) present in a protein.<p><a href='/help/family_and_domains_section' target='_top'>More...</a></p>Family & Domainsi

Domains and Repeats

Feature keyPosition(s)DescriptionActionsGraphical viewLength
<p>This subsection of the <a href="http://www.uniprot.org/help/family%5Fand%5Fdomains%5Fsection">Family and Domains</a> section describes the position and type of a domain, which is defined as a specific combination of secondary structures organized into a characteristic three-dimensional structure or fold.<p><a href='/help/domain' target='_top'>More...</a></p>Domaini167 – 251Ig-like C2-typePROSITE-ProRule annotationAdd BLAST85

Region

Feature keyPosition(s)DescriptionActionsGraphical viewLength
<p>This subsection of the 'Family and Domains' section describes a region of interest that cannot be described in other subsections.<p><a href='/help/region' target='_top'>More...</a></p>Regioni148 – 160Important for interaction with IZUMO1R1 PublicationAdd BLAST13

<p>This subsection of the 'Family and domains' section provides general information on the biological role of a domain. The term 'domain' is intended here in its wide acceptation, it may be a structural domain, a transmembrane region or a functional domain. Several domains are described in this subsection.<p><a href='/help/domain_cc' target='_top'>More...</a></p>Domaini

The extracellular domain assumes a distinct boomerang shape when not bound to IZUMO1R/JUNO (PubMed:27309818). Interaction with IZUMO1R/JUNO triggers a conformation change, so that the IZUMO1 extracellular domain assumes an upright conformation (PubMed:27309818).1 Publication
The cytoplasmic C-terminus region is not essential for fertilization. It is however required for protein stability.By similarity

<p>This subsection of the 'Family and domains' section provides information about the sequence similarity with other proteins.<p><a href='/help/sequence_similarities' target='_top'>More...</a></p>Sequence similaritiesi

Belongs to the Izumo family.Curated

Keywords - Domaini

Immunoglobulin domain, Signal, Transmembrane, Transmembrane helix

Phylogenomic databases

evolutionary genealogy of genes: Non-supervised Orthologous Groups

More...eggNOGi		ENOG502SFD8, Eukaryota

Ensembl GeneTree

More...GeneTreei		ENSGT00390000015014

The HOGENOM Database of Homologous Genes from Fully Sequenced Organisms

More...HOGENOMi		CLU_044481_0_0_1

InParanoid: Eukaryotic Ortholog Groups

More...InParanoidi		Q8IYV9

Identification of Orthologs from Complete Genome Data

More...OMAi		PATIINF

Database of Orthologous Groups

More...OrthoDBi		813463at2759

Database for complete collections of gene phylogenies

More...PhylomeDBi		Q8IYV9

TreeFam database of animal gene trees

More...TreeFami		TF338356

Family and domain databases

Gene3D Structural and Functional Annotation of Protein Families

More...Gene3Di		2.60.40.10, 1 hit

Integrated resource of protein families, domains and functional sites

More...InterProi		View protein in InterPro
IPR036179, Ig-like_dom_sf
IPR013783, Ig-like_fold
IPR029389, IZUMO
IPR032699, Izumo-Ig
IPR032700, IZUMO1

The PANTHER Classification System

More...PANTHERi		PTHR35540, PTHR35540, 1 hit

Pfam protein domain database

More...Pfami		View protein in Pfam
PF15005, IZUMO, 1 hit
PF16706, Izumo-Ig, 1 hit

Superfamily database of structural and functional annotation

More...SUPFAMi		SSF48726, SSF48726, 1 hit

<p>This section displays by default the canonical protein sequence and upon request all isoforms described in the entry. It also includes information pertinent to the sequence(s), including <a href="http://www.uniprot.org/help/sequence%5Flength">length</a> and <a href="http://www.uniprot.org/help/sequences">molecular weight</a>. The information is filed in different subsections. The current subsections and their content are listed below:<p><a href='/help/sequences_section' target='_top'>More...</a></p>Sequences (3+)i

<p>This subsection of the <a href="http://www.uniprot.org/help/sequences%5Fsection">Sequence</a> section indicates if the <a href="http://www.uniprot.org/help/canonical%5Fand%5Fisoforms">canonical sequence</a> displayed by default in the entry is complete or not.<p><a href='/help/sequence_status' target='_top'>More...</a></p>Sequence statusi: Complete.

<p>This subsection of the <a href="http://www.uniprot.org/help/sequences%5Fsection">Sequence</a> section indicates if the <a href="http://www.uniprot.org/help/canonical%5Fand%5Fisoforms">canonical sequence</a> displayed by default in the entry is in its mature form or if it represents the precursor.<p><a href='/help/sequence_processing' target='_top'>More...</a></p>Sequence processingi: The displayed sequence is further processed into a mature form.

This entry describes 3 <p>This subsection of the 'Sequence' section lists the alternative protein sequences (isoforms) that can be generated from the same gene by a single or by the combination of up to four biological events (alternative promoter usage, alternative splicing, alternative initiation and ribosomal frameshifting). Additionally, this section gives relevant information on each alternative protein isoform.<p><a href='/help/alternative_products' target='_top'>More...</a></p> isoformsi produced by alternative splicing. AlignAdd to basket

This entry has 3 described isoforms and 1 potential isoform that is computationally mapped.Show allAlign All

Isoform 1 (identifier: Q8IYV9-1) [UniParc]FASTAAdd to basket

This isoform has been chosen as the <p><strong>What is the canonical sequence?</strong><p><a href='/help/canonical_and_isoforms' target='_top'>More...</a></p>canonicali sequence. All positional information in this entry refers to it. This is also the sequence that appears in the downloadable versions of the entry.

« Hide
        10         20         30         40         50
MGPHFTLLCA ALAGCLLPAE GCVICDPSVV LALKSLEKDY LPGHLDAKHH 
        60         70         80         90        100
KAMMERVENA VKDFQELSLN EDAYMGVVDE ATLQKGSWSL LKDLKRITDS 
       110        120        130        140        150
DVKGDLFVKE LFWMLHLQKE TFATYVARFQ KEAYCPNKCG VMLQTLIWCK 
       160        170        180        190        200
NCKKEVHACR KSYDCGERNV EVPQMEDMIL DCELNWHQAS EGLTDYSFYR 
       210        220        230        240        250
VWGNNTETLV SKGKEATLTK PMVGPEDAGS YRCELGSVNS SPATIINFHV 
       260        270        280        290        300
TVLPKMIKEE KPSPNIVTPG EATTESSISL QPLQPEKMLA SRLLGLLICG 
       310        320        330        340        350
SLALITGLTF AIFRRRKVID FIKSSLFGLG SGAAEQTQVP KEKATDSRQQ
Length:350
Mass (Da):38,930
Last modified:May 18, 2010 - v2
<p>The checksum is a form of redundancy check that is calculated from the sequence. It is useful for tracking sequence updates.</p> <p>It should be noted that while, in theory, two different sequences could have the same checksum value, the likelihood that this would happen is extremely low.</p> <p>However UniProtKB may contain entries with identical sequences in case of multiple genes (paralogs).</p> <p>The checksum is computed as the sequence 64-bit Cyclic Redundancy Check value (CRC64) using the generator polynomial: x<sup>64</sup> + x<sup>4</sup> + x<sup>3</sup> + x + 1. The algorithm is described in the ISO 3309 standard. </p> <p class="publication">Press W.H., Flannery B.P., Teukolsky S.A. and Vetterling W.T.<br /> <strong>Cyclic redundancy and other checksums</strong><br /> <a href="http://www.nrbook.com/b/bookcpdf.php">Numerical recipes in C 2nd ed., pp896-902, Cambridge University Press (1993)</a>)</p> Checksum:i8741BB3F93ABCFA9
GO
Isoform 2 (identifier: Q8IYV9-2) [UniParc]FASTAAdd to basket

The sequence of this isoform differs from the canonical sequence as follows:
     167-194: ERNVEVPQMEDMILDCELNWHQASEGLT → GERTGPSRRNWCRAECGSSSNGRHDPGL
     195-350: Missing.

Show »
Length:194
Mass (Da):21,758
Checksum:i9D56F3FC6B308080
GO
Isoform 3 (identifier: Q8IYV9-3) [UniParc]FASTAAdd to basket

The sequence of this isoform differs from the canonical sequence as follows:
     57-68: VENAVKDFQELS → MRPHCKRGPGVC
     69-350: Missing.

Show »
Length:68
Mass (Da):7,339
Checksum:iA637C1EEBC33D4FE
GO

<p>In eukaryotic reference proteomes, unreviewed entries that are likely to belong to the same gene are computationally mapped, based on gene identifiers from Ensembl, EnsemblGenomes and model organism databases.<p><a href='/help/gene_centric_isoform_mapping' target='_top'>More...</a></p>Computationally mapped potential isoform sequencesi

There is 1 potential isoform mapped to this entry.BLASTAlignShow allAdd to basket
EntryEntry nameProtein names
Gene namesLengthAnnotation
M0R0B8M0R0B8_HUMAN
Izumo sperm-egg fusion protein 1
IZUMO1
15Annotation score:

Annotation score:1 out of 5

<p>The annotation score provides a heuristic measure of the annotation content of a UniProtKB entry or proteome. This score <strong>cannot</strong> be used as a measure of the accuracy of the annotation as we cannot define the 'correct annotation' for any given protein.<p><a href='/help/annotation_score' target='_top'>More...</a></p>

Experimental Info

Feature keyPosition(s)DescriptionActionsGraphical viewLength
<p>This subsection of the 'Sequence' section reports difference(s) between the canonical sequence (displayed by default in the entry) and the different sequence submissions merged in the entry. These various submissions may originate from different sequencing projects, different types of experiments, or different biological samples. Sequence conflicts are usually of unknown origin.<p><a href='/help/conflict' target='_top'>More...</a></p>Sequence conflicti36L → P in AAS59145 (Ref. 2) Curated1

Natural variant

Feature keyPosition(s)DescriptionActionsGraphical viewLength
<p>This subsection of the 'Sequence' section describes natural variant(s) of the protein sequence.<p><a href='/help/variant' target='_top'>More...</a></p>Natural variantiVAR_055399333A → V3 PublicationsCorresponds to variant dbSNP:rs2307019Ensembl.1

Alternative sequence

Feature keyPosition(s)DescriptionActionsGraphical viewLength
<p>This subsection of the 'Sequence' section describes the sequence of naturally occurring alternative protein isoform(s). The changes in the amino acid sequence may be due to alternative splicing, alternative promoter usage, alternative initiation, or ribosomal frameshifting.<p><a href='/help/var_seq' target='_top'>More...</a></p>Alternative sequenceiVSP_01696057 – 68VENAV…FQELS → MRPHCKRGPGVC in isoform 3. 1 PublicationAdd BLAST12
Alternative sequenceiVSP_01696169 – 350Missing in isoform 3. 1 PublicationAdd BLAST282
Alternative sequenceiVSP_016962167 – 194ERNVE…SEGLT → GERTGPSRRNWCRAECGSSS NGRHDPGL in isoform 2. 1 PublicationAdd BLAST28
Alternative sequenceiVSP_016963195 – 350Missing in isoform 2. 1 PublicationAdd BLAST156

Sequence databases

Select the link destinations:

EMBL nucleotide sequence database

More...EMBLi

GenBank nucleotide sequence database

More...GenBanki

DNA Data Bank of Japan; a nucleotide sequence database

More...DDBJi
Links Updated
AB195682 mRNA Translation: BAD91012.1
AY552609 mRNA Translation: AAS59145.1
AY552610 mRNA Translation: AAS59146.1
AC009002 Genomic DNA No translation available.
BC034769 mRNA Translation: AAH34769.1

The Consensus CDS (CCDS) project

More...CCDSi		CCDS12732.1 [Q8IYV9-1]

NCBI Reference Sequences

More...RefSeqi		NP_001308794.1, NM_001321865.1
NP_872381.2, NM_182575.2 [Q8IYV9-1]
XP_011525114.1, XM_011526812.2
XP_011525115.1, XM_011526813.2

Genome annotation databases

Ensembl eukaryotic genome annotation project

More...Ensembli		ENST00000332955.7; ENSP00000327786.2; ENSG00000182264.9
ENST00000595517.5; ENSP00000471815.1; ENSG00000182264.9 [Q8IYV9-3]
ENST00000595937.5; ENSP00000470144.1; ENSG00000182264.9 [Q8IYV9-2]

Database of genes from NCBI RefSeq genomes

More...GeneIDi		284359

KEGG: Kyoto Encyclopedia of Genes and Genomes

More...KEGGi		hsa:284359

Matched Annotation from NCBI and EMBL-EBI (MANE) - Phase one

More...MANE-Selecti		ENST00000332955.7; ENSP00000327786.2; NM_182575.3; NP_872381.2

UCSC genome browser

More...UCSCi		uc002pkj.3, human [Q8IYV9-1]

Keywords - Coding sequence diversityi

Alternative splicing

<p>This section provides links to proteins that are similar to the protein sequence(s) described in this entry at different levels of sequence identity thresholds (100%, 90% and 50%) based on their membership in UniProt Reference Clusters (<a href="http://www.uniprot.org/help/uniref">UniRef</a>).<p><a href='/help/similar_proteins_section' target='_top'>More...</a></p>Similar proteinsi

<p>This section is used to point to information related to entries and found in data collections other than UniProtKB.<p><a href='/help/cross_references_section' target='_top'>More...</a></p>Cross-referencesi

Sequence databases

Select the link destinations:
EMBLi
GenBanki
DDBJi
Links Updated
AB195682 mRNA Translation: BAD91012.1
AY552609 mRNA Translation: AAS59145.1
AY552610 mRNA Translation: AAS59146.1
AC009002 Genomic DNA No translation available.
BC034769 mRNA Translation: AAH34769.1
CCDSiCCDS12732.1 [Q8IYV9-1]
RefSeqiNP_001308794.1, NM_001321865.1
NP_872381.2, NM_182575.2 [Q8IYV9-1]
XP_011525114.1, XM_011526812.2
XP_011525115.1, XM_011526813.2

3D structure databases

Select the link destinations:

Protein Data Bank Europe

More...PDBei

Protein Data Bank RCSB

More...RCSB PDBi

Protein Data Bank Japan

More...PDBji
Links Updated
PDB entryMethodResolution (Å)ChainPositionsPDBsum
5F4EX-ray2.40A22-254[»]
5F4TX-ray3.08A22-254[»]
5F4VX-ray2.90A22-268[»]
5JK9X-ray2.10A/B/C/D/E/F22-255[»]
5JKCX-ray2.90A22-255[»]
5JKDX-ray2.90A22-255[»]
5JKEX-ray2.86A/C22-255[»]
AlphaFoldDBiQ8IYV9
SMRiQ8IYV9
ModBaseiSearch...
PDBe-KBiSearch...

Protein-protein interaction databases

BioGRIDi129843, 28 interactors
CORUMiQ8IYV9
DIPiDIP-62033N
IntActiQ8IYV9, 21 interactors
STRINGi9606.ENSP00000327786

Protein family/group databases

TCDBi8.A.55.1.1, the izumo sperm-egg fusion protein 1 (izumo1) family

PTM databases

GlyGeniQ8IYV9, 1 site
iPTMnetiQ8IYV9
PhosphoSitePlusiQ8IYV9

Genetic variation databases

BioMutaiIZUMO1
DMDMi296434545

Proteomic databases

MassIVEiQ8IYV9
PaxDbiQ8IYV9
PeptideAtlasiQ8IYV9
PRIDEiQ8IYV9
ProteomicsDBi71246 [Q8IYV9-1]
71247 [Q8IYV9-2]

Protocols and materials databases

ABCD curated depository of sequenced antibodies

More...ABCDi		Q8IYV9, 9 sequenced antibodies

Antibodypedia a portal for validated antibodies

More...Antibodypediai		31796, 137 antibodies from 22 providers

The DNASU plasmid repository

More...DNASUi		284359

Genome annotation databases

EnsembliENST00000332955.7; ENSP00000327786.2; ENSG00000182264.9
ENST00000595517.5; ENSP00000471815.1; ENSG00000182264.9 [Q8IYV9-3]
ENST00000595937.5; ENSP00000470144.1; ENSG00000182264.9 [Q8IYV9-2]
GeneIDi284359
KEGGihsa:284359
MANE-SelectiENST00000332955.7; ENSP00000327786.2; NM_182575.3; NP_872381.2
UCSCiuc002pkj.3, human [Q8IYV9-1]

Organism-specific databases

Comparative Toxicogenomics Database

More...CTDi		284359
DisGeNETi284359

GeneCards: human genes, protein and diseases

More...GeneCardsi		IZUMO1
HGNCiHGNC:28539, IZUMO1
HPAiENSG00000182264, Tissue enriched (testis)
MIMi609278, gene
neXtProtiNX_Q8IYV9
OpenTargetsiENSG00000182264
PharmGKBiPA142671647
VEuPathDBiHostDB:ENSG00000182264

GenAtlas: human gene database

More...GenAtlasi		Search...

Phylogenomic databases

eggNOGiENOG502SFD8, Eukaryota
GeneTreeiENSGT00390000015014
HOGENOMiCLU_044481_0_0_1
InParanoidiQ8IYV9
OMAiPATIINF
OrthoDBi813463at2759
PhylomeDBiQ8IYV9
TreeFamiTF338356

Enzyme and pathway databases

PathwayCommonsiQ8IYV9
ReactomeiR-HSA-1300645, Acrosome Reaction and Sperm:Oocyte Membrane Binding
SignaLinkiQ8IYV9

Miscellaneous databases

BioGRID ORCS database of CRISPR phenotype screens

More...BioGRID-ORCSi		284359, 13 hits in 1069 CRISPR screens

ChiTaRS: a database of human, mouse and fruit fly chimeric transcripts and RNA-sequencing data

More...ChiTaRSi		IZUMO1, human

Database of phenotypes from RNA interference screens in Drosophila and Homo sapiens

More...GenomeRNAii		284359
PharosiQ8IYV9, Tbio

Protein Ontology

More...PROi		PR:Q8IYV9
RNActiQ8IYV9, protein

The Stanford Online Universal Resource for Clones and ESTs

More...SOURCEi		Search...

Gene expression databases

BgeeiENSG00000182264, Expressed in testis and 106 other tissues
ExpressionAtlasiQ8IYV9, baseline and differential
GenevisibleiQ8IYV9, HS

Family and domain databases

Gene3Di2.60.40.10, 1 hit
InterProiView protein in InterPro
IPR036179, Ig-like_dom_sf
IPR013783, Ig-like_fold
IPR029389, IZUMO
IPR032699, Izumo-Ig
IPR032700, IZUMO1
PANTHERiPTHR35540, PTHR35540, 1 hit
PfamiView protein in Pfam
PF15005, IZUMO, 1 hit
PF16706, Izumo-Ig, 1 hit
SUPFAMiSSF48726, SSF48726, 1 hit

MobiDB: a database of protein disorder and mobility annotations

More...MobiDBi		Search...

<p>This section provides general information on the entry.<p><a href='/help/entry_information_section' target='_top'>More...</a></p>Entry informationi

<p>This subsection of the 'Entry information' section provides a mnemonic identifier for a UniProtKB entry, but it is not a stable identifier. Each reviewed entry is assigned a unique entry name upon integration into UniProtKB/Swiss-Prot.<p><a href='/help/entry_name' target='_top'>More...</a></p>Entry nameiIZUM1_HUMAN
<p>This subsection of the 'Entry information' section provides one or more accession number(s). These are stable identifiers and should be used to cite UniProtKB entries. Upon integration into UniProtKB, each entry is assigned a unique accession number, which is called 'Primary (citable) accession number'.<p><a href='/help/accession_numbers' target='_top'>More...</a></p>AccessioniPrimary (citable) accession number: Q8IYV9
Secondary accession number(s): Q6Q8P6, Q6Q8P7
<p>This subsection of the 'Entry information' section shows the date of integration of the entry into UniProtKB, the date of the last sequence update and the date of the last annotation modification ('Last modified'). The version number for both the entry and the <a href="http://www.uniprot.org/help/canonical%5Fand%5Fisoforms">canonical sequence</a> are also displayed.<p><a href='/help/entry_history' target='_top'>More...</a></p>Entry historyiIntegrated into UniProtKB/Swiss-Prot: January 10, 2006
Last sequence update: May 18, 2010
Last modified: May 25, 2022
This is version 153 of the entry and version 2 of the sequence. See complete history.
<p>This subsection of the 'Entry information' section indicates whether the entry has been manually annotated and reviewed by UniProtKB curators or not, in other words, if the entry belongs to the Swiss-Prot section of UniProtKB (<strong>reviewed</strong>) or to the computer-annotated TrEMBL section (<strong>unreviewed</strong>).<p><a href='/help/entry_status' target='_top'>More...</a></p>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.

<p>This section contains any relevant information that doesn't fit in any other defined sections<p><a href='/help/miscellaneous_section' target='_top'>More...</a></p>Miscellaneousi

Keywords - Technical termi

3D-structure, Reference proteome

Documents

  1. Human chromosome 19
    Human chromosome 19: entries, gene names and cross-references to MIM
  2. Human entries with genetic variants
    List of human entries with genetic variants
  3. Human variants curated from literature reports
    Index of human variants curated from literature reports
  4. MIM cross-references
    Online Mendelian Inheritance in Man (MIM) cross-references in UniProtKB/Swiss-Prot
  5. PDB cross-references
    Index of Protein Data Bank (PDB) cross-references
  6. SIMILARITY comments
    Index of protein domains and families
UniProt is an ELIXIR core data resource
Main funding by: National Institutes of Health

We'd like to inform you that we have updated our Privacy Notice to comply with Europe’s new General Data Protection Regulation (GDPR) that applies since 25 May 2018.

Do not show this banner again