title: XLS13A and XLS13B: SRY-related genes of Xenopus laevis.
abstract: SRY-related cDNAs, XLS13A and XLS13B, have been isolated from Xenopus laevis ovary. The cDNAs encode polypeptides of 382 and 375 amino acids, respectively. Nucleotide sequences of the two cDNAs are highly homologous to each other. The type-A and type-B XLS13 proteins, and xSox13 reported previously share an identical high mobility group (HMG) box at the amino acid level, although they contain silent nucleotide alterations. The HMG box exhibits strong similarity (> 93% amino acid identity) to those of mouse Sox4/human SOX4 and chicken Sox11/human SOX11. The size of XLS13A/XLS13B mRNA was estimated to be 2.8 knt in Xenopus ovary by Northern analysis. Reverse transcription/polymerase chain reaction (RT/PCR) assay indicated that XLS13A and XLS13B mRNAs are present in various tissues of adult frog. The mRNAs of XLS13A and XLS13B of maternal origin found in unfertilized eggs disappear in the early stages of the Xenopus embryo. DNA-binding properties of the XLS13 HMG domain were examined by electrophoretic mobility shift assay (EMSA). The HMG domain preferentially binds to the canonical target sequence of SOX proteins, AACAAT, in vitro.
authors.affiliation: Department of Anatomy, Keio University School of Medicine, Tokyo, Japan.
authors.forename: Y
authors.initials: Y
authors.lastname: Hiraoka
authors.forename: N
authors.initials: N
authors.lastname: Komatsu
authors.forename: Y
authors.initials: Y
authors.lastname: Sakai
authors.forename: M
authors.initials: M
authors.lastname: Ogawa
authors.forename: M
authors.initials: M
authors.lastname: Shiozawa
authors.forename: S
authors.initials: S
authors.lastname: Aiso
mesh_terms: D000595:Amino Acid Sequence; D000818:Animals; D001483:Base Sequence; D003001:Cloning, Molecular; D004247:DNA / Q000378:metabolism; D018076:DNA, Complementary / Q000235:genetics*; D004268:DNA-Binding Proteins / Q000235:genetics* / Q000378:metabolism; D004625:Embryo, Nonmammalian / Q000737:chemistry; D018628:Gene Dosage; D018507:Gene Expression Regulation, Developmental; D005809:Genes, Regulator / Q000235:genetics*; D006609:High Mobility Group Proteins / Q000235:genetics* / Q000378:metabolism; D008969:Molecular Sequence Data; D009928:Organ Specificity; D012333:RNA, Messenger / Q000032:analysis; D017422:Sequence Analysis, DNA; D017386:Sequence Homology, Amino Acid; D029867:Xenopus Proteins; D014982:Xenopus laevis / Q000196:embryology / Q000235:genetics*
chemical_list: D018076:DNA, Complementary; D004268:DNA-Binding Proteins; D006609:High Mobility Group Proteins; D012333:RNA, Messenger; C108715:XLS13A protein, Xenopus; D029867:Xenopus Proteins; D004247:DNA