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TCL1B (T-cell leukemia/lymphoma 1B)

Written2008-01Herbert Eradat, Michael A Teitell
Departments of Medicine (H.E.), Pathology, Laboratory Medicine (M.A.T.), David Geffen School of Medicine at UCLA, 675 Charles Young Drive South, 4-762 MacDonald Research Laboratories, Los Angeles, CA 90095-1732, USA

(Note : for Links provided by Atlas : click)


Alias_namesT-cell leukemia/lymphoma 1B
Alias_symbol (synonym)TML1
Other alias
LocusID (NCBI) 9623
Atlas_Id 354
Location 14q32.13  [Link to chromosome band 14q32]
Location_base_pair Starts at 95686417 and ends at 95692643 bp from pter ( according to hg19-Feb_2009)  [Mapping TCL1B.png]
Local_order centromere - TCL6 (TNG1 and TNG2) - TCL1B - TCL1A - telomere
Fusion genes
(updated 2017)
Data from Atlas, Mitelman, Cosmic Fusion, Fusion Cancer, TCGA fusion databases with official HUGO symbols (see references in chromosomal bands)
TCL6 (14q32.13) / TCL1B (14q32.13)


Description 6.5 kb TCL1B cDNA. 4 exons (181, 171, 69, 697 bp); centromere - exons 1 to 4 - telomere orientation; only the first three exons are coding. Located 15-16 kb centromeric of TCL1A.
Transcription TCL1B transcripts detected by RT-PCR or Northern blot in fetal tissues (liver, thymus, spleen, and kidney) and in testis, placenta, peripheral blood lymphocytes, kidney, tonsil, spleen, and bone marrow.
Pseudogene Localized to 5q12-5q13, lacks an initiating ATG and introns and has a stop codon in the middle of the ORF.


Description 15 kDa, 128 amino acid protein; one domain with a beta-barrel topology.
Expression Undefined
Localisation Undefined
Function Undefined in vivo but binds and coactivates AKT (protein kinase B) in vitro and in transfected cell lines.
Homology 30% identical to TCL1A, 60% similar to TCL1A
36% identical to MTCP1, 63% similar to MTCP1

Implicated in

Entity Expression in rare mature T cell leukemias carrying t(14;14)(q11;q32.1) causing a TRA/TRD -TCL1A/TCL1B translocation.
Entity Expression in some Burkitt lymphoma cell lines.
Disease May be upregulated in T-cell prolymphocytic leukemia (T-PLL) with t(14;14)(q11;q32.1) and in Burkitt lymphoma .
Oncogenesis TCL1 over expression by chromosomal rearrangement is a critical oncogenetic mechanism in T-PLL; a role for TCL1B over expression in oncogenesis is not yet shown.


Differential regulation of Akt kinase isoforms by the members of the TCL1 oncogene family.
Laine J, Künstle G, Obata T, Noguchi M
The Journal of biological chemistry. 2002 ; 277 (5) : 3743-3751.
PMID 11707444
Tcl1 enhances Akt kinase activity and mediates its nuclear translocation.
Pekarsky Y, Koval A, Hallas C, Bichi R, Tresini M, Malstrom S, Russo G, Tsichlis P, Croce CM
Proceedings of the National Academy of Sciences of the United States of America. 2000 ; 97 (7) : 3028-3033.
PMID 10716693
Identification of the TCL1/MTCP1-like 1 (TML1) gene from the region next to the TCL1 locus.
Sugimoto J, Hatakeyama T, Narducci MG, Russo G, Isobe M
Cancer research. 1999 ; 59 (10) : 2313-2317.
PMID 10344735
The TCL1 family of oncoproteins: co-activators of transformation.
Teitell MA
Nature reviews. Cancer. 2005 ; 5 (8) : 640-648.
PMID 16056259


This paper should be referenced as such :
Eradat, H ; Teitell, MA
TCL1B (T-cell leukemia/lymphoma 1B)
Atlas Genet Cytogenet Oncol Haematol. 2008;12(5):389-390.
Free journal version : [ pdf ]   [ DOI ]
On line version :

External links

HGNC (Hugo)TCL1B   11649
Entrez_Gene (NCBI)TCL1B  9623  T cell leukemia/lymphoma 1B
AliasesSYN-1; TML1
GeneCards (Weizmann)TCL1B
Ensembl hg19 (Hinxton)ENSG00000213231 [Gene_View]
Ensembl hg38 (Hinxton)ENSG00000213231 [Gene_View]  ENSG00000213231 [Sequence]  chr14:95686417-95692643 [Contig_View]  TCL1B [Vega]
ICGC DataPortalENSG00000213231
TCGA cBioPortalTCL1B
Genatlas (Paris)TCL1B
SOURCE (Princeton)TCL1B
Genetics Home Reference (NIH)TCL1B
Genomic and cartography
GoldenPath hg38 (UCSC)TCL1B  -     chr14:95686417-95692643 +  14q32.13   [Description]    (hg38-Dec_2013)
GoldenPath hg19 (UCSC)TCL1B  -     14q32.13   [Description]    (hg19-Feb_2009)
GoldenPathTCL1B - 14q32.13 [CytoView hg19]  TCL1B - 14q32.13 [CytoView hg38]
Mapping of homologs : NCBITCL1B [Mapview hg19]  TCL1B [Mapview hg38]
Gene and transcription
Genbank (Entrez)AB018563 AF110466 AF137027 AI250350 BC041616
RefSeq transcript (Entrez)NM_004918 NM_199206
RefSeq genomic (Entrez)
Consensus coding sequences : CCDS (NCBI)TCL1B
Alternative Splicing GalleryENSG00000213231
Gene ExpressionTCL1B [ NCBI-GEO ]   TCL1B [ EBI - ARRAY_EXPRESS ]   TCL1B [ SEEK ]   TCL1B [ MEM ]
Gene Expression Viewer (FireBrowse)TCL1B [ Firebrowse - Broad ]
SOURCE (Princeton)Expression in : [Datasets]   [Normal Tissue Atlas]  [carcinoma Classsification]  [NCI60]
BioGPS (Tissue expression)9623
GTEX Portal (Tissue expression)TCL1B
Human Protein AtlasENSG00000213231-TCL1B [pathology]   [cell]   [tissue]
Protein : pattern, domain, 3D structure
Domain families : Pfam (Sanger)
Domain families : Pfam (NCBI)
Conserved Domain (NCBI)TCL1B
DMDM Disease mutations9623
Blocks (Seattle)TCL1B
Human Protein Atlas [tissue]ENSG00000213231-TCL1B [tissue]
IPIIPI00001504   IPI00385245   
Protein Interaction databases
Ontologies - Pathways
Huge Navigator TCL1B [HugePedia]
snp3D : Map Gene to Disease9623
BioCentury BCIQTCL1B
Clinical trials, drugs, therapy
Chemical/Protein Interactions : CTD9623
Chemical/Pharm GKB GenePA36401
Clinical trialTCL1B
canSAR (ICR)TCL1B (select the gene name)
DataMed IndexTCL1B
PubMed15 Pubmed reference(s) in Entrez
GeneRIFsGene References Into Functions (Entrez)
REVIEW articlesautomatic search in PubMed
Last year publicationsautomatic search in PubMed

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indexed on : Fri Feb 7 13:55:04 CET 2020

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