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Phenotypes Associated with This Genotype
either: (involves: 129 * 129P2/OlaHsd) or (involves: 129P2/OlaHsd * C57BL/6)
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Tyk2tm1Shmd mutation (0 available); any Tyk2 mutation (8 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
adipose tissue
• marker analysis indicates abnormal brown adipose tissue (BAT) development
• BAT cells contain large unilocular fat droplets compared to multilocular fat droplets in wild-type BAT
• preadiopocytes do not differentiate

• preadiopocytes do not differentiate
• mitochondria of BAT and skeletal muscle, but not in the heart, shows disorganized cristae
• oxygen consumption is decreased in mitochondria when pyruvate and malate are used as substrates for complex I activity and succinate for complex II activity
• addition of GDP decreases oxygen consumption in wild-type but not mutant mitochondria

• increase in body weight is seen as early as 12-16 weeks of age on a normal chow diet
• by 12 months of age, mutants are about 20 grams heavier than wild-type mice
• however, mutants exhibit normal food intake and physical activity

• body temperatures are lower in mutants than controls when exposed to 4 degrees C for 12 hours
• produce 20% less heat during both day and night cycles
• abnormal glucose clearance suggestive of insulin resistance

Mouse Models of Human Disease
OMIM ID Ref(s)
Obesity 601665 J:195099

Contributing Projects:
Mouse Genome Database (MGD), Gene Expression Database (GXD), Mouse Tumor Biology (MTB), Gene Ontology (GO), MouseCyc
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last database update
MGI 6.01
The Jackson Laboratory