About   Help   FAQ
Phenotypes associated with this allele
Allele Symbol
Allele Name
Allele ID
Gtf2i+
wild type
MGI:2435089
Summary 2 genotypes
Jump to Allelic Composition Genetic Background Genotype ID
ht1
Gtf2iGt(XE029)Byg/Gtf2i+ involves: 129P2/OlaHsd * C57BL/6 MGI:3831546
ht2
Gtf2itm1Vcam/Gtf2i+ involves: 129S1/Sv * 129X1/SvJ * CD-1 MGI:5532294


Genotype
MGI:3831546
ht1
Allelic
Composition
Gtf2iGt(XE029)Byg/Gtf2i+
Genetic
Background
involves: 129P2/OlaHsd * C57BL/6
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Gtf2iGt(XE029)Byg mutation (1 available); any Gtf2i mutation (137 available)
phenotype observed in females
phenotype observed in males
N normal phenotype

Reduced growth, exencephaly and craniofacial and pigmentation defects in Gtf2iGt(XE029)Byg/Gtf2i+ and Gtf2ird1Gt(XE465)Byg/Gtf2ird1+ mice

craniofacial
• Although most heterozygote are normal and fertile, at low frequency, growth retardation and small head are also reported
• some heterozygous embryos at E11.5 and E12.5 shows bitemporal narrowing of head

nervous system
• in some heterozygous embryos

growth/size/body
• some heterozygous embryos at E11.5 and E12.5 shows bitemporal narrowing of head
• some heterozygous mice are significantly smaller than their wild-type littermates

Mouse Models of Human Disease
DO ID OMIM ID(s) Ref(s)
Williams-Beuren syndrome DOID:1928 OMIM:194050
J:143508




Genotype
MGI:5532294
ht2
Allelic
Composition
Gtf2itm1Vcam/Gtf2i+
Genetic
Background
involves: 129S1/Sv * 129X1/SvJ * CD-1
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Gtf2itm1Vcam mutation (1 available); any Gtf2i mutation (137 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
behavior/neurological
• in an elevated plus maze, mice exhibit decreased percentage of entries and time in the open arms compared with wild-type mice
• in an open field, mice exhibit increased freezing in the central zone initially with fewer entries into the central zone later compared with wild-type mice
• in a light/dark box, mice exhibit increased latency to first entry and decreased numbers of entries compared with wild-type mice





Contributing Projects:
Mouse Genome Database (MGD), Gene Expression Database (GXD), Mouse Models of Human Cancer database (MMHCdb) (formerly Mouse Tumor Biology (MTB)), Gene Ontology (GO)
Citing These Resources
Funding Information
Warranty Disclaimer, Privacy Notice, Licensing, & Copyright
Send questions and comments to User Support.
last database update
01/13/2026
MGI 6.24
The Jackson Laboratory