Locus JBS CBL

Disease ID
JBS
Gene ID
CBL
Updated
Jun 15, 2026
v2.22.0
Other gene loci
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Disease

Name Jacobsen syndrome (FRAX11B fragile site)
Inheritance
Description
A multiple congenital anomaly/intellectual disability contiguous gene syndrome caused by partial deletion of the long arm of chromosome 11 .
Prevalence
1/100,000 births; female/male ratio 2:1 . Found across ancestries/ethnicities .
Age of Onset Age of Onset(Typical)Years0  00  0
Condition at birth.
HPO Terms
Association
Mendelian

Locus

Details
70% of individuals have 11 repeats , but pathogenic expansion can span hundreds of motifs . The CGG repeat expansion can lead to a fragile site and subsequent deletion of 11q (shown in 2 cases) but total causality is unclear; intermediate alleles are associated with a premutation .
Mechanism
Hypermethylation
DNA hypermethylation/11q deletion in sporadic cases .
Detection
Year
1995
Location in Gene
5' UTR
Gene Strand

Alleles

Ref. Motif
CGG
Ranges BenignIntermediatePathogenicUnits5  7980  100101  300
Benign (ref.)
Benign (gene)
Pathogenic (ref.)
CGG
Pathogenic (gene)
CGG
Unknown (ref.)
Unknown (gene)
Interruption (ref.)
Interruption (gene)

References

Direct supporting references for info on this page.

1
Ontology Lookup Service (OLS)
mondo:0007838
2
Jacobsen syndrome.
Teresa,Mattina, Concetta Simona,Perrotta, Paul,Grossfeld
Orphanet journal of rare diseases · 2009-03-07
pmid:19267933
4
Association of a chromosome deletion syndrome with a fragile site within the proto-oncogene CBL2.
C,Jones, L,Penny, T,Mattina, S,Yu, E,Baker, L,Voullaire, W Y,Langdon, G R,Sutherland, R I,Richards, A,Tunnacliffe
Nature · 1995-07-13
pmid:7603564
5
Co-localisation of CCG repeats and chromosome deletion breakpoints in Jacobsen syndrome: evidence for a common mechanism of chromosome breakage.
C,Jones, R,Müllenbach, P,Grossfeld, R,Auer, R,Favier, K,Chien, M,James, A,Tunnacliffe, F,Cotter
Human molecular genetics · 2000-05-01
pmid:10767345
6
Sequence composition changes in short tandem repeats: heterogeneity, detection, mechanisms and clinical implications.
Indhu-Shree,Rajan-Babu, Egor,Dolzhenko, Michael A,Eberle, Jan M,Friedman
Nature reviews. Genetics · 2024-03-11
pmid:38467784

Additional Literature

Additional literature related to this locus.

Raw PubMed search results
(All PubMed results returned by searching for this gene, tandem repeats, and disease, in medline format)

CBL Syndrome With Granular Cell Tumor and café au lait macules: Expansion of the Phenotype.
Caitlin N,Harrington, Emily,Kohl, Zainab,Gilitwala, Joyce,Teng, Dawn H,Siegel, Gregory W,Charville, Robert J,Steffner, David A,Stevenson
American journal of medical genetics. Part A · 2026-04-10
pmid:41964119
Genome-wide identification of TaCIPK gene family members in wheat and their roles in host response to Blumeria graminis f. sp. tritici infection.
Xiaoying,Liu, Xueqing,Wang, Chenxiao,Yang, Guangyu,Wang, Baoli,Fan, Yuntao,Shang, Chen,Dang, Chaojie,Xie, Zhenying,Wang
International journal of biological macromolecules · 2023-07-06
pmid:37422244
A high occurrence of acquisition and/or expansion of C-CBL mutant clones in the progression of high-risk myelodysplastic syndrome to acute myeloid leukemia.
Hsiao-Wen,Kao, Masashi,Sanada, Der-Cherng,Liang, Chang-Liang,Lai, En-Hui,Lee, Ming-Chung,Kuo, Tung-Liang,Lin, Yu-Shu,Shih, Jin-Hou,Wu, Chein-Fuang,Huang, Seishi,Ogawa, Lee-Yung,Shih
Neoplasia (New York, N.Y.) · 2011-11-01
pmid:22131879
Expansion of functionally anergic CD21-/low marginal zone-like B cell clones in hepatitis C virus infection-related autoimmunity.
Benjamin,Terrier, Florence,Joly, Thomas,Vazquez, Philippe,Benech, Michelle,Rosenzwajg, Wassila,Carpentier, Marlène,Garrido, Pascale,Ghillani-Dalbin, David,Klatzmann, Patrice,Cacoub, David,Saadoun
Journal of immunology (Baltimore, Md. : 1950) · 2011-11-14
pmid:22084433
The WD40 repeats of FANCL are required for Fanconi anemia core complex assembly.
Allan M,Gurtan, Patricia,Stuckert, Alan D,D'Andrea
The Journal of biological chemistry · 2006-02-10
pmid:16474167