Nonepidermal members of the keratin multigene family: cDNA sequences and in situ localization of the mRNAs.
A keratin set which consists of a type I 47kd and a type II 57kd protein occurs as a major constituent of the keratin patterns of various internal stratified epithelia of the mouse. We have isolated specific cDNA clones of the two complementary keratin subunits from a cDNA library constructed with polyA+RNA of mouse tongue epithelium and present the complete nucleotide and deduced amino acid sequences of the 57kd protein and about 75% of the corresponding data of the 47kd protein. The comparison of the sequence data with those of known epidermal keratin mRNAs coding for the two types of keratin proteins reveals a fundamentally identical and type-specific organization of the mRNAs into both highly conserved and variable domains. In order to avoid cross-reactions with other members of the keratin multigene family, appropriately taylored 35S-labeled cDNA probes comprising the low and non-homologous 3' coding and noncoding domains of the mRNAs were used for in situ hybridization to tissue sections. The localization and distribution of the corresponding transcripts indicates a strongly compartmentalized keratin expression in mouse tongue epithelium.
B
B
Knapp
M
M
Rentrop
J
J
Schweizer
H
H
Winter
D000595:Amino Acid Sequence; D000818:Animals; D001483:Base Sequence; D003001:Cloning, Molecular; D004247:DNA / Q000032:analysis*; D004848:Epithelium / Q000378:metabolism; D005796:Genes; D007633:Keratins / Q000235:genetics*; D051379:Mice; D008970:Molecular Weight; D009693:Nucleic Acid Hybridization; D010957:Plasmids; D011061:Poly A / Q000235:genetics; D014176:Protein Biosynthesis; D012313:RNA / Q000235:genetics; D012333:RNA, Messenger / Q000032:analysis / Q000235:genetics*; D014059:Tongue / Q000378:metabolism; D014158:Transcription, Genetic
D012333:RNA, Messenger; D011061:Poly A; D012313:RNA; D007633:Keratins; D004247:DNA