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XACT X active specific transcript [ Homo sapiens (human) ]

Gene ID: 105463123, updated on 12-Oct-2019


Official Symbol
XACTprovided by HGNC
Official Full Name
X active specific transcriptprovided by HGNC
Primary source
See related
Gene type
RefSeq status
Homo sapiens
Eukaryota; Metazoa; Chordata; Craniata; Vertebrata; Euteleostomi; Mammalia; Eutheria; Euarchontoglires; Primates; Haplorrhini; Catarrhini; Hominidae; Homo
This gene produces a spliced long non-coding RNA that is thought to play a role in the control of X-chromosome inactivation (XCI). This transcript has been shown to specifically coat the active X chromosome in human pluripotent cells. [provided by RefSeq, Mar 2015]
Annotation information
Annotation category: partial on reference assembly
Low expression observed in reference dataset See more

Genomic context

See XACT in Genome Data Viewer
Exon count:
Annotation release Status Assembly Chr Location
109.20190905 current GRCh38.p13 (GCF_000001405.39) X NC_000023.11 (113616300..113618153, complement)

Chromosome X - NC_000023.11Genomic Context describing neighboring genes Neighboring gene uncharacterized LOC101928437 Neighboring gene peptidylprolyl isomerase H pseudogene 2 Neighboring gene queuine tRNA-ribosyltransferase catalytic subunit 1 pseudogene 1 Neighboring gene RNA, U1 small nuclear 57, pseudogene

Genomic regions, transcripts, and products

Genomic Sequence:
NC_000023.11 Chromosome X Reference GRCh38.p13 Primary Assembly


  • Project title: HPA RNA-seq normal tissues
  • Description: RNA-seq was performed of tissue samples from 95 human individuals representing 27 different tissues in order to determine tissue-specificity of all protein-coding genes
  • BioProject: PRJEB4337
  • Publication: PMID 24309898
  • Analysis date: Wed Apr 4 07:08:55 2018

General gene information

Other Names

  • X active coating transcript
  • X active specific transcript (non-protein coding)

NCBI Reference Sequences (RefSeq)

RefSeqs maintained independently of Annotated Genomes

These reference sequences exist independently of genome builds. Explain

These reference sequences are curated independently of the genome annotation cycle, so their versions may not match the RefSeq versions in the current genome build. Identify version mismatches by comparing the version of the RefSeq in this section to the one reported in Genomic regions, transcripts, and products above.


  1. NR_131204.1 RNA Sequence

    Status: REVIEWED

    Source sequence(s)
    AC236668, BQ010753

RefSeqs of Annotated Genomes: Homo sapiens Annotation Release 109.20190905

The following sections contain reference sequences that belong to a specific genome build. Explain

Reference GRCh38.p13 Primary Assembly


  1. NC_000023.11 Reference GRCh38.p13 Primary Assembly

    113616300..113618153 complement
    GenBank, FASTA, Sequence Viewer (Graphics)
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