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Protein

Glycoprotein Xg

Gene

XG

Organism
Homo sapiens (Human)
Status
Reviewed-Annotation score: Annotation score: 4 out of 5-Experimental evidence at transcript leveli

Functioni

Keywords - Molecular functioni

Blood group antigen

Enzyme and pathway databases

BioCyciZFISH:ENSG00000124343-MONOMER.

Names & Taxonomyi

Protein namesi
Recommended name:
Glycoprotein Xg
Alternative name(s):
Protein PBDX
Gene namesi
Name:XG
Synonyms:PBDX
OrganismiHomo sapiens (Human)
Taxonomic identifieri9606 [NCBI]
Taxonomic lineageiEukaryotaMetazoaChordataCraniataVertebrataEuteleostomiMammaliaEutheriaEuarchontogliresPrimatesHaplorrhiniCatarrhiniHominidaeHomo
Proteomesi
  • UP000005640 Componenti: Chromosome X

Organism-specific databases

HGNCiHGNC:12806. XG.

Subcellular locationi

Topology

Feature keyPosition(s)DescriptionActionsGraphical viewLength
Topological domaini22 – 142ExtracellularSequence analysisAdd BLAST121
Transmembranei143 – 163HelicalSequence analysisAdd BLAST21
Topological domaini164 – 180CytoplasmicSequence analysisAdd BLAST17

GO - Cellular componenti

  • integral component of plasma membrane Source: UniProtKB
Complete GO annotation...

Keywords - Cellular componenti

Cell membrane, Membrane

Pathology & Biotechi

Organism-specific databases

DisGeNETi7499.
MIMi314700. phenotype.
OpenTargetsiENSG00000124343.
PharmGKBiPA37405.

Polymorphism and mutation databases

BioMutaiXG.
DMDMi2499136.

PTM / Processingi

Molecule processing

Feature keyPosition(s)DescriptionActionsGraphical viewLength
Signal peptidei1 – 21Sequence analysisAdd BLAST21
ChainiPRO_000002269322 – 180Glycoprotein XgAdd BLAST159

Post-translational modificationi

O-glycosylated.Curated

Keywords - PTMi

Glycoprotein

Proteomic databases

PeptideAtlasiP55808.
PRIDEiP55808.

PTM databases

iPTMnetiP55808.
PhosphoSitePlusiP55808.

Expressioni

Tissue specificityi

Expressed in erythroid tissues, including thymus, bone marrow and fetal liver, and in several nonerythroid tissues, such as heart, placenta, skeletal muscle, thyroid and trachea, as well as in skin fibroblasts. Expression is low or undetectable in other tissues.1 Publication

Gene expression databases

BgeeiENSG00000124343.
CleanExiHS_XG.
ExpressionAtlasiP55808. baseline and differential.
GenevisibleiP55808. HS.

Organism-specific databases

HPAiHPA021539.

Structurei

3D structure databases

ProteinModelPortaliP55808.
SMRiP55808.
ModBaseiSearch...
MobiDBiSearch...

Family & Domainsi

Sequence similaritiesi

Belongs to the CD99 family.Curated

Keywords - Domaini

Signal, Transmembrane, Transmembrane helix

Phylogenomic databases

GeneTreeiENSGT00510000049811.
HOGENOMiHOG000233665.
HOVERGENiHBG086239.
InParanoidiP55808.
OMAiRRNCFRT.
OrthoDBiEOG091G0SNQ.
PhylomeDBiP55808.
TreeFamiTF336273.

Family and domain databases

InterProiIPR022078. CD99L2.
[Graphical view]
PfamiPF12301. CD99L2. 1 hit.
[Graphical view]

Sequences (3)i

Sequence statusi: Complete.

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

This entry describes 3 isoformsi produced by alternative splicing. AlignAdd to basket

Isoform 1 (identifier: P55808-1) [UniParc]FASTAAdd to basket

This isoform has been chosen as the 'canonical' 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
MESWWGLPCL AFLCFLMHAR GQRDFDLADA LDDPEPTKKP NSDIYPKPKP
60 70 80 90 100
PYYPQPENPD SGGNIYPRPK PRPQPQPGNS GNSGGYFNDV DRDDGRYPPR
110 120 130 140 150
PRPRPPAGGG GGGYSSYGNS DNTHGGDHHS TYGNPEGNMV AKIVSPIVSV
160 170 180
VVVTLLGAAA SYFKLNNRRN CFRTHEPENV
Length:180
Mass (Da):19,723
Last modified:November 1, 1997 - v1
Checksum:iDADAA9E6859C4530
GO
Isoform 2 (identifier: P55808-2) [UniParc]FASTAAdd to basket

The sequence of this isoform differs from the canonical sequence as follows:
     85-85: G → GS

Note: No experimental confirmation available.
Show »
Length:181
Mass (Da):19,810
Checksum:i8B4531340686355C
GO
Isoform 3 (identifier: P55808-3) [UniParc]FASTAAdd to basket

The sequence of this isoform differs from the canonical sequence as follows:
     125-125: G → GRGGYRLNSRYGNTYG

Note: No experimental confirmation available.Curated
Show »
Length:195
Mass (Da):21,439
Checksum:iB823CA02B7EEB8DF
GO

Experimental Info

Feature keyPosition(s)DescriptionActionsGraphical viewLength
Isoform 3 (identifier: P55808-3)
Sequence conflicti131L → P in AAI00766 (PubMed:15489334).Curated1

Polymorphismi

XG is responsible for the Xg blood group system.1 Publication

Natural variant

Feature keyPosition(s)DescriptionActionsGraphical viewLength
Natural variantiVAR_05406360D → N.1 PublicationCorresponds to variant rs5939319dbSNPEnsembl.1

Alternative sequence

Feature keyPosition(s)DescriptionActionsGraphical viewLength
Alternative sequenceiVSP_03731985G → GS in isoform 2. 1 Publication1
Alternative sequenceiVSP_037320125G → GRGGYRLNSRYGNTYG in isoform 3. 1 Publication1

Sequence databases

Select the link destinations:
EMBLi
GenBanki
DDBJi
Links Updated
X96421 Genomic DNA. No translation available.
AF380356 mRNA. Translation: AAL04055.1.
AF534880 mRNA. Translation: AAN03481.1.
AC006209 Genomic DNA. No translation available.
AC138085 Genomic DNA. No translation available.
BC100765 mRNA. Translation: AAI00766.1.
BC100766 mRNA. Translation: AAI00767.1.
BC100767 mRNA. Translation: AAI00768.1.
CCDSiCCDS14120.1. [P55808-1]
CCDS48073.1. [P55808-3]
PIRiS43791.
RefSeqiNP_001135391.1. NM_001141919.1. [P55808-3]
NP_001135392.1. NM_001141920.1. [P55808-2]
NP_780778.1. NM_175569.2. [P55808-1]
UniGeneiHs.179675.

Genome annotation databases

EnsembliENST00000381174; ENSP00000370566; ENSG00000124343. [P55808-1]
ENST00000419513; ENSP00000411004; ENSG00000124343. [P55808-3]
GeneIDi7499.
KEGGihsa:7499.
UCSCiuc004cqp.5. human. [P55808-1]

Keywords - Coding sequence diversityi

Alternative splicing, Polymorphism

Cross-referencesi

Web resourcesi

dbRBC/BGMUT

Blood group antigen gene mutation database

Sequence databases

Select the link destinations:
EMBLi
GenBanki
DDBJi
Links Updated
X96421 Genomic DNA. No translation available.
AF380356 mRNA. Translation: AAL04055.1.
AF534880 mRNA. Translation: AAN03481.1.
AC006209 Genomic DNA. No translation available.
AC138085 Genomic DNA. No translation available.
BC100765 mRNA. Translation: AAI00766.1.
BC100766 mRNA. Translation: AAI00767.1.
BC100767 mRNA. Translation: AAI00768.1.
CCDSiCCDS14120.1. [P55808-1]
CCDS48073.1. [P55808-3]
PIRiS43791.
RefSeqiNP_001135391.1. NM_001141919.1. [P55808-3]
NP_001135392.1. NM_001141920.1. [P55808-2]
NP_780778.1. NM_175569.2. [P55808-1]
UniGeneiHs.179675.

3D structure databases

ProteinModelPortaliP55808.
SMRiP55808.
ModBaseiSearch...
MobiDBiSearch...

PTM databases

iPTMnetiP55808.
PhosphoSitePlusiP55808.

Polymorphism and mutation databases

BioMutaiXG.
DMDMi2499136.

Proteomic databases

PeptideAtlasiP55808.
PRIDEiP55808.

Protocols and materials databases

Structural Biology KnowledgebaseSearch...

Genome annotation databases

EnsembliENST00000381174; ENSP00000370566; ENSG00000124343. [P55808-1]
ENST00000419513; ENSP00000411004; ENSG00000124343. [P55808-3]
GeneIDi7499.
KEGGihsa:7499.
UCSCiuc004cqp.5. human. [P55808-1]

Organism-specific databases

CTDi7499.
DisGeNETi7499.
GeneCardsiXG.
H-InvDBHIX0213635.
HGNCiHGNC:12806. XG.
HPAiHPA021539.
MIMi300879. gene.
314700. phenotype.
neXtProtiNX_P55808.
OpenTargetsiENSG00000124343.
PharmGKBiPA37405.
GenAtlasiSearch...

Phylogenomic databases

GeneTreeiENSGT00510000049811.
HOGENOMiHOG000233665.
HOVERGENiHBG086239.
InParanoidiP55808.
OMAiRRNCFRT.
OrthoDBiEOG091G0SNQ.
PhylomeDBiP55808.
TreeFamiTF336273.

Enzyme and pathway databases

BioCyciZFISH:ENSG00000124343-MONOMER.

Miscellaneous databases

ChiTaRSiXG. human.
GenomeRNAii7499.
PROiP55808.
SOURCEiSearch...

Gene expression databases

BgeeiENSG00000124343.
CleanExiHS_XG.
ExpressionAtlasiP55808. baseline and differential.
GenevisibleiP55808. HS.

Family and domain databases

InterProiIPR022078. CD99L2.
[Graphical view]
PfamiPF12301. CD99L2. 1 hit.
[Graphical view]
ProtoNetiSearch...

Entry informationi

Entry nameiXG_HUMAN
AccessioniPrimary (citable) accession number: P55808
Secondary accession number(s): E9PCH1
, Q496N8, Q496N9, Q496P0, Q71BZ5
Entry historyi
Integrated into UniProtKB/Swiss-Prot: November 1, 1997
Last sequence update: November 1, 1997
Last modified: November 2, 2016
This is version 125 of the entry and version 1 of the sequence. [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

Miscellaneous

The gene coding for this protein is located in the pseudoautosomal region 1 (PAR1) of X and Y chromosomes.

Keywords - Technical termi

Complete proteome, Reference proteome

Documents

  1. Blood group antigen proteins
    Nomenclature of blood group antigens and list of entries
  2. Human chromosome X
    Human chromosome X: entries, gene names and cross-references to MIM
  3. Human entries with polymorphisms or disease mutations
    List of human entries with polymorphisms or disease mutations
  4. Human polymorphisms and disease mutations
    Index of human polymorphisms and disease mutations
  5. MIM cross-references
    Online Mendelian Inheritance in Man (MIM) cross-references in UniProtKB/Swiss-Prot
  6. SIMILARITY comments
    Index of protein domains and families

Similar proteinsi

Links to similar proteins from the UniProt Reference Clusters (UniRef) at 100%, 90% and 50% sequence identity:
100%UniRef100 combines identical sequences and sub-fragments with 11 or more residues from any organism into one UniRef entry.
90%UniRef90 is built by clustering UniRef100 sequences that have at least 90% sequence identity to, and 80% overlap with, the longest sequence (a.k.a seed sequence).
50%UniRef50 is built by clustering UniRef90 seed sequences that have at least 50% sequence identity to, and 80% overlap with, the longest sequence in the cluster.