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Entry version 57 (11 Dec 2019)
Sequence version 2 (28 Jul 2009)
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Protein

E3 ubiquitin-protein ligase XIAP

Gene

xiap

Organism
Xenopus laevis (African clawed frog)
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 transcript 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

Multi-functional protein which regulates not only caspases and apoptosis, but also acts as an E3 ubiquitin-protein ligase mediating ubiquitination and subsequent proteasomal degradation of its target proteins. Acts as a direct caspase inhibitor. A key apoptotic suppressor in eggs. Acts as a positive regulator of Wnt signaling.2 Publications

<p>This subsection of the <a href="http://www.uniprot.org/help/function_section">Function</a> section describes the catalytic activity of an enzyme, i.e. a chemical reaction that the enzyme catalyzes.<p><a href='/help/catalytic_activity' target='_top'>More...</a></p>Catalytic activityi

  • S-ubiquitinyl-[E2 ubiquitin-conjugating enzyme]-L-cysteine + [acceptor protein]-L-lysine = [E2 ubiquitin-conjugating enzyme]-L-cysteine + N(6)-ubiquitinyl-[acceptor protein]-L-lysine. EC:2.3.2.27

Sites

Feature keyPosition(s)DescriptionActionsGraphical viewLength
<p>This subsection of the <a href="http://www.uniprot.org/help/function_section">Function</a> section indicates at which position the protein binds a given metal ion. The nature of the metal is indicated in the ‘Description’ field.<p><a href='/help/metal' target='_top'>More...</a></p>Metal bindingi298ZincPROSITE-ProRule annotationBy similarity1
Metal bindingi301ZincPROSITE-ProRule annotationBy similarity1
Metal bindingi318ZincPROSITE-ProRule annotationBy similarity1
Metal bindingi325ZincPROSITE-ProRule annotationBy similarity1

Regions

Feature keyPosition(s)DescriptionActionsGraphical viewLength
<p>This subsection of the <a href="http://www.uniprot.org/help/function_section">Function</a> section specifies the position(s) and type(s) of zinc fingers within the protein.<p><a href='/help/zn_fing' target='_top'>More...</a></p>Zinc fingeri441 – 476RING-typePROSITE-ProRule annotationAdd BLAST36

<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

GO - Biological processi

<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

Molecular functionDevelopmental protein, Protease inhibitor, Thiol protease inhibitor, Transferase
Biological processApoptosis, Ubl conjugation pathway, Wnt signaling pathway
LigandMetal-binding, Zinc

<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_and_taxonomy_section">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:
E3 ubiquitin-protein ligase XIAPBy similarity (EC:2.3.2.27)
Alternative name(s):
Baculoviral IAP repeat-containing protein 4By similarity
RING-type E3 ubiquitin transferase XIAP
X-linked inhibitor of apoptosis protein1 Publication
Short name:
X-linked IAP1 Publication
Short name:
xXIAP1 Publication
<p>This subsection of the <a href="http://www.uniprot.org/help/names_and_taxonomy_section">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:xiap
Synonyms:birc4By similarity
<p>This subsection of the <a href="http://www.uniprot.org/help/names_and_taxonomy_section">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>OrganismiXenopus laevis (African clawed frog)
<p>This subsection of the <a href="http://www.uniprot.org/help/names_and_taxonomy_section">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 identifieri8355 [NCBI]
<p>This subsection of the <a href="http://www.uniprot.org/help/names_and_taxonomy_section">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 lineageiEukaryotaMetazoaChordataCraniataVertebrataEuteleostomiAmphibiaBatrachiaAnuraPipoideaPipidaeXenopodinaeXenopusXenopus

Organism-specific databases

Xenopus laevis and tropicalis biology and genomics resource

More...
Xenbasei
XB-GENE-948852 xiap

<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

Keywords - Cellular componenti

Cytoplasm

<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 describes the extent of a polypeptide chain in the mature protein following processing.<p><a href='/help/chain' target='_top'>More...</a></p>ChainiPRO_00003799571 – 488E3 ubiquitin-protein ligase XIAPAdd BLAST488

<p>This subsection of the <a href="http://www.uniprot.org/help/ptm_processing_section">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

Ubiquitinated and degraded by the proteasome in apoptotic cells (By similarity). Degraded in a 2-step mechanism; a caspase-independent first step and a caspase-dependent second step. Stabilized indirectly by MAPK, which acts to delay caspase activation, rather than directly phosphorylating xiap.By similarity

Keywords - PTMi

Ubl conjugation

Proteomic databases

MaxQB - The MaxQuant DataBase

More...
MaxQBi
A5D8Q0

PRoteomics IDEntifications database

More...
PRIDEi
A5D8Q0

<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 the gene product at various stages of a cell, tissue or organism development. By default, the information is derived from experiments at the mRNA level, unless specified ‘at the protein level’.<p><a href='/help/developmental_stage' target='_top'>More...</a></p>Developmental stagei

Expressed maternally.1 Publication

<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_section">'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_section">'Function'</a> section).<p><a href='/help/subunit_structure' target='_top'>More...</a></p>Subunit structurei

Monomer, and homodimer.

By similarity

<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

3D structure databases

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

More...
SMRi
A5D8Q0

Database of comparative protein structure models

More...
ModBasei
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 ‘Family and Domains’ section indicates the positions and types of repeated sequence motifs or repeated domains within the protein.<p><a href='/help/repeat' target='_top'>More...</a></p>Repeati40 – 105BIR 1Sequence analysisAdd BLAST66
Repeati176 – 241BIR 2Sequence analysisAdd BLAST66
Repeati266 – 329BIR 3Sequence analysisAdd BLAST64

<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 BIR and RING-type domains are dispensable for anti-apoptotic function.1 Publication

<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 IAP family.Sequence analysis

Zinc finger

Feature keyPosition(s)DescriptionActionsGraphical viewLength
Zinc fingeri441 – 476RING-typePROSITE-ProRule annotationAdd BLAST36

Keywords - Domaini

Repeat, Zinc-finger

Phylogenomic databases

KEGG Orthology (KO)

More...
KOi
K04725

Database of Orthologous Groups

More...
OrthoDBi
1340284at2759

Family and domain databases

Conserved Domains Database

More...
CDDi
cd00022 BIR, 3 hits
cd14395 UBA_BIRC4_8, 1 hit

Gene3D Structural and Functional Annotation of Protein Families

More...
Gene3Di
3.30.40.10, 1 hit

Integrated resource of protein families, domains and functional sites

More...
InterProi
View protein in InterPro
IPR001370 BIR_rpt
IPR042579 XIAP/BIRC8_UBA
IPR001841 Znf_RING
IPR013083 Znf_RING/FYVE/PHD

Pfam protein domain database

More...
Pfami
View protein in Pfam
PF00653 BIR, 3 hits

Simple Modular Architecture Research Tool; a protein domain database

More...
SMARTi
View protein in SMART
SM00238 BIR, 3 hits
SM00184 RING, 1 hit

PROSITE; a protein domain and family database

More...
PROSITEi
View protein in PROSITE
PS01282 BIR_REPEAT_1, 2 hits
PS50143 BIR_REPEAT_2, 3 hits
PS50089 ZF_RING_2, 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_length">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 (2)i

<p>This subsection of the <a href="http://www.uniprot.org/help/sequences_section">Sequence</a> section indicates if the <a href="http://www.uniprot.org/help/canonical_and_isoforms">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.

This entry describes 2 <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
Isoform 1 (identifier: A5D8Q0-1) [UniParc]FASTAAdd to basket

This isoform has been chosen as the <div> <p><b>What is the canonical sequence?</b><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
MEPQIVKFVF KEEMTCQCPK MSDSACDVDT DQNYFEEEVR LASFANFSSS
60 70 80 90 100
YPVSAPALAR AGFYYTGDGD RVKCFSCMAM VEDWQHGDTA IGKHRKISPN
110 120 130 140 150
CKFINGFNNF RSDCIQTQAP VMQNSHANGF PNSAEDPGEK SSSEIMADYM
160 170 180 190 200
LRTGRVVDMS KPKYPRHMAM CSEEARLQTF QNWPGYSPLM PKELANAGLF
210 220 230 240 250
YTGINDQVKC FCCGGKLMNW EPSDRAWTEH KKHFPECYFV LGRDVGNVTR
260 270 280 290 300
DASVQGSTYM NSYNARLETF SSWPFPIDKE TLAKAGFYRI GDEDATKCFS
310 320 330 340 350
CGGMLNCWAA NDDPWEEHAK AYPGCQFLIE EKGQQFINNA QLQRPILHKA
360 370 380 390 400
NSGEASPALP KDTSFLKNPL VIYAQQMGFP LEEIKKVMGQ KLKTTGNNYT
410 420 430 440 450
CVEEFVSDLL CAQSETIADK PMKREISIEE KLRQLEEEKV CKVCMDRRIT
460 470 480
IVFIPCGHLV ACAVCADVLD KCPICCTIIE RRQKIFMS
Length:488
Mass (Da):55,129
Last modified:July 28, 2009 - 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:iD83F7081FF6EB528
GO
Isoform 21 Publication (identifier: A5D8Q0-2) [UniParc]FASTAAdd to basket

The sequence of this isoform differs from the canonical sequence as follows:
     1-13: Missing.
     362-424: Missing.

Show »
Length:412
Mass (Da):46,399
Checksum:i0DF9A939BAD12BDE
GO

<p>This subsection of the ‘Sequence’ section reports difference(s) between the protein sequence shown in the UniProtKB entry and other available protein sequences derived from the same gene.<p><a href='/help/sequence_caution' target='_top'>More...</a></p>Sequence cautioni

The sequence AAI41766 differs from that shown. Reason: Erroneous initiation.Curated

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 conflicti231K → Q in BAD98268 (PubMed:15853809).Curated1

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_0531381 – 13Missing in isoform 2. 1 PublicationAdd BLAST13
Alternative sequenceiVSP_053139362 – 424Missing in isoform 2. 1 PublicationAdd BLAST63

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
AB197252 mRNA Translation: BAD98268.1
BC141765 mRNA Translation: AAI41766.1 Different initiation.

NCBI Reference Sequences

More...
RefSeqi
NP_001089083.1, NM_001095614.1

Genome annotation databases

Database of genes from NCBI RefSeq genomes

More...
GeneIDi
733235

KEGG: Kyoto Encyclopedia of Genes and Genomes

More...
KEGGi
xla:733235

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
AB197252 mRNA Translation: BAD98268.1
BC141765 mRNA Translation: AAI41766.1 Different initiation.
RefSeqiNP_001089083.1, NM_001095614.1

3D structure databases

SMRiA5D8Q0
ModBaseiSearch...

Proteomic databases

MaxQBiA5D8Q0
PRIDEiA5D8Q0

Genome annotation databases

GeneIDi733235
KEGGixla:733235

Organism-specific databases

Comparative Toxicogenomics Database

More...
CTDi
733235
XenbaseiXB-GENE-948852 xiap

Phylogenomic databases

KOiK04725
OrthoDBi1340284at2759

Family and domain databases

CDDicd00022 BIR, 3 hits
cd14395 UBA_BIRC4_8, 1 hit
Gene3Di3.30.40.10, 1 hit
InterProiView protein in InterPro
IPR001370 BIR_rpt
IPR042579 XIAP/BIRC8_UBA
IPR001841 Znf_RING
IPR013083 Znf_RING/FYVE/PHD
PfamiView protein in Pfam
PF00653 BIR, 3 hits
SMARTiView protein in SMART
SM00238 BIR, 3 hits
SM00184 RING, 1 hit
PROSITEiView protein in PROSITE
PS01282 BIR_REPEAT_1, 2 hits
PS50143 BIR_REPEAT_2, 3 hits
PS50089 ZF_RING_2, 1 hit

ProtoNet; Automatic hierarchical classification of proteins

More...
ProtoNeti
Search...

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 nameiXIAP_XENLA
<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: A5D8Q0
Secondary accession number(s): Q50L37
<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_and_isoforms">canonical sequence</a> are also displayed.<p><a href='/help/entry_history' target='_top'>More...</a></p>Entry historyiIntegrated into UniProtKB/Swiss-Prot: July 28, 2009
Last sequence update: July 28, 2009
Last modified: December 11, 2019
This is version 57 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

<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

Documents

  1. SIMILARITY comments
    Index of protein domains and families
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