Nucleotide sequence and expression of ribosomal protein S3 mRNA during embryogenesis in the Mexican axolotl (Ambystoma mexicanum).
We have isolated and sequenced a full-length (0.9 kb) cDNA clone of ribosomal protein S3 by subtraction hybridization using a single-stranded cDNA library from stage 25-27 (tracer) and the mRNA from stage 15-17 (driver) of embryonic Mexican axolotl (Ambystoma mexicanum). The axolotl is a unique animal model for studying heart development as well as myofibrillogenesis because it carries a mutation in gene c. The deduced amino acid sequence of axolotl S3 protein shows about 93.9% identity with human S3 protein over a 243 amino acid residue overlap. When compared with mouse and Xenopus laevis ribosomal S3 proteins, the axolotl sequenc shows 94.3 and 93.9% identity respectively. Interestingly, the axolotl S3 sequence shows higher identity at the nucleic acid level with human and/or other mammals than with Xenopus. The S3 transcript, as determined by RT-PCR, is present at stage 2-4 in a lower amount and the onset of transcription is most likely at the beginning of gastrulation (10-12). The expression level of S3 transcripts reaches a maximum by mid gastrulation (stages 13-14) and then follows a biphasic pattern being lower at stages 16-17 with subsequently steady increases until the mid tailbud stages (25-27).
Bhatia
R
R
SUNY Health Science Center at Syracuse, Department of Anatomy and Cell Biology 13210, USA.
Dube
D K
DK
Lemanski
L F
LF
D000558:Ambystoma mexicanum / Q000196:embryology* / Q000378:metabolism*; D000595:Amino Acid Sequence; D000818:Animals; D001483:Base Sequence; D003001:Cloning, Molecular; D018076:DNA, Complementary / Q000032:analysis / Q000235:genetics; D005260:Female; D006801:Humans; D008297:Male; D051379:Mice; D008969:Molecular Sequence Data; D009693:Nucleic Acid Hybridization; D012333:RNA, Messenger / Q000378:metabolism*; D012269:Ribosomal Proteins / Q000096:biosynthesis* / Q000235:genetics
D018076:DNA, Complementary; D012333:RNA, Messenger; D012269:Ribosomal Proteins; C044152:ribosomal protein S3