A human MSX1 homeodomain missense mutation causes selective tooth agenesis.
We demonstrate that a mutation in the homeobox gene, MSX1, causes a common developmental anomaly, familial tooth agenesis. Genetic linkage analyses in a family with autosomal dominant agenesis of second premolars and third molars identified a locus on chromosome 4p, where the MSX1 gene resides. Sequence analyses demonstrated an Arg31Pro missense mutation in the homeodomain of MSX1 in all affected family members. Arg 31 is a highly conserved homeodomain residue that interacts with the ribose phosphate backbone of target DNA. We propose that the Arg31 Pro mutatrion comprises MSX1 interactions, and suggest that MSX1 functions are critical for normal development of specific human teeth.
Vastardis
H
H
Department of Genetics and Howard Hughes Medical Institute, Harvard Medical School, Boston, Massachusetts 02115, USA.
Karimbux
N
N
Guthua
S W
SW
Seidman
J G
JG
Seidman
C E
CE
D000483:Alleles; D000595:Amino Acid Sequence; D000848:Anodontia / Q000235:genetics*; D001483:Base Sequence; D002894:Chromosomes, Human, Pair 4; D017931:DNA Primers / Q000737:chemistry; D005260:Female; D005799:Genes, Dominant; D005801:Genes, Homeobox; D008040:Genetic Linkage; D018398:Homeodomain Proteins / Q000235:genetics*; D006801:Humans; D051957:MSX1 Transcription Factor; D008297:Male; D008969:Molecular Sequence Data; D010375:Pedigree; D017354:Point Mutation; D016415:Sequence Alignment; D017386:Sequence Homology, Amino Acid; D013329:Structure-Activity Relationship; D014157:Transcription Factors
D017931:DNA Primers; D018398:Homeodomain Proteins; D051957:MSX1 Transcription Factor; D014157:Transcription Factors