Mouse Strain information
APB ID 149
Added 06/02/2006
Last Edited 19/08/2015
Strain name: B6.129-Sykbtm1Paw Tg(IghelMD4)4Ccg/AnuApb
Nickname: Syk -/- :Hamlet
Strain designation name: B6.129-Sykbtm1Paw Tg(IghelMD4)4Ccg/AnuApb
Strain Types Mutant strain
Genetic Details Targeted knockout
Mode of Inheritance Recessive
1.  Affected Gene Name: spleen tyrosine kinase  
Chromosome 13
Affected Gene Symbol Syk
Protein expression of altered gene: Nil
Genetic alteration of gene: A neomycin cassette replaced an exon that encodes 41 amino acids that are located in the subdomain VI of the kinase domain. Immunoprecipitation and western blot analysis on protein extracts derived from fetal liver showed that no SYK protein was present in homozygous mice.
Location on chromosome (bp): 52678542-52744161 bp, + strand (From VEGA annotation of NCBI Build 37)
MGI Gene Accession ID

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Allele Name targeted mutation 1, Tony Pawson
Allele Symbol Syktm1Paw
MGI Allele Accession ID MGI:1857421
1.   Transgene: transgene insertion 4, Christopher C Goodnow  
Mutant Construction Technique None
Phenotype Homozygous State Homozygous syk mutants suffered severe haemorrhaging as embryos and died perinatally, indicating that Syk has a critical role in maintaining vascular integrity or in wound healing during embryogenesis. Analysis of syk-/- lymphoid cells showed that the syk mutation impaired the differentiation of B-lineage cells, apparently by disrupting signalling from the pre-BCR complex and thereby preventing the clonal expansion, and further maturation, of pre-B cells.
Original Genetic Background 129X1 (Sykb) C57BL/6 (MD4)
Genetic Background Currently Maintained C57BL/6
Strain identification
How is this strain characterised? Genotyping
Fertility and Strain maintenance
Fertility and Strain maintenance
Relevant bibliographic / database references
Strain Specific References
Other Related References
General information
Associated IP rights? No
Does it Model a Human Condition? Unknown
Applicable Research Areas Research tools
Immunology and inflammation
Developmental biology
  • B cell
  • kinase
  • vascular
  • hen egg lysozyme
  • lymphocyte
Is the strain available in any form to other researchers Yes
APB stock stored as: Cryopreserved sperm (from 4 mice)

APB stock genotyped verified by: Unverified
Are live mice available? No
MTA needs to be signed? Yes



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