Isolation and characterization of the mouse homolog of SYT, a gene implicated in the development of human synovial sarcomas.

In a previous study we reported the isolation of the human synovial sarcoma-associated t(X;18) breakpoint. As a result of this translocation, the SYT gene on chromosome 18 fuses to either the SSX1 or the SSX2 gene on the X chromosome, depending on the exact location of the breakpoint within band Xp11.2.

Normal development, growth and reproduction in cellular retinoic acid binding protein-I (CRABPI) null mutant mice.

We have generated mouse null mutants for the cellular retinoic acid (RA) binding protein type I (CRABPI), a protein whose spatio-temporal expression pattern coincides with the target tissues for RA action. Inactivation of the CRABPI gene was accomplished via homologous recombination in embryonic stem cells. Cells carrying the correctly targeted gene were injected into blastocysts and the resulting chimaeras yielded offspring heterozygous for the knockout mutation.

Molecular analysis of a flagellar core protein gene of Serpulina (Treponema) hyodysenteriae.

The flaB2 gene encoding a protein located in the core of the periplasmic flagella of Serpulina hyodysenteriae was cloned and sequenced. The FlaB2 protein consists of 285 amino acids and has a calculated molecular mass of 31.1 kDa.

The periplasmic flagella of Serpulina (Treponema) hyodysenteriae are composed of two sheath proteins and three core proteins.

The major components of the periplasmic flagella of the spirochaete Serpulina (Treponema) hyodysenteriae strain C5 were purified and characterized. We demonstrate that the periplasmic flagella are composed of five major proteins (molecular masses 44, 37, 35, 34 and 32 kDa) and present their location, N-terminal amino acid sequence and immunological relationship. The 44 kDa and the 35 kDa protein are on the sheath of the periplasmic flagellum, whereas the 37, 34 and 32 kDa protein reside in the periplasmic flagellar core.