Psx, a novel murine homeobox gene expressed in placenta.
To identify homeobox genes involved in mouse embryo development, we have screened a mouse cDNA library prepared from the 13.5-day-old entire conceptus for homeobox-containing sequences using a polymerase chain reaction (PCR) cloning strategy. We identified a mouse homeobox gene that might be the prototype of a new class. The full-length cDNA, designated Psx (placenta specific-homeobox), encodes a protein of 247 amino acids. The expression patterns of the Psx during embryonic development and in adult tissues were studied by Northern blot analysis. The Psx transcript was first detected at embryonic day 8.5 of conceptus and persisted until birth. Psx mRNA is expressed in extraembryonic tissues, mainly in placenta, but not in fetus, pups and adult tissues tested, suggesting that Psx plays an important role in placenta. Psx is a new member of the murine homeobox genes which are expressed in extraembryonic tissues such as placenta and amnion.
Han
Y J
YJ
Kumho Life and Environmental Science Laboratory, Kwangju-City, South Korea.
Park
A R
AR
Sung
D Y
DY
Chun
J Y
JY
D000595:Amino Acid Sequence; D000650:Amnion / Q000378:metabolism; D000818:Animals; D001483:Base Sequence; D015139:Blotting, Southern; D018076:DNA, Complementary / Q000302:isolation & purification; D005314:Embryonic and Fetal Development / Q000235:genetics; D005260:Female; D005326:Fetal Proteins / Q000096:biosynthesis / Q000235:genetics; D015870:Gene Expression; D005801:Genes, Homeobox; D018398:Homeodomain Proteins / Q000096:biosynthesis / Q000235:genetics*; D051379:Mice; D008813:Mice, Inbred ICR; D008969:Molecular Sequence Data; D010920:Placenta / Q000378:metabolism*; D011247:Pregnancy; D011257:Pregnancy Proteins / Q000096:biosynthesis / Q000235:genetics*; D017386:Sequence Homology, Amino Acid
D018076:DNA, Complementary; D005326:Fetal Proteins; D018398:Homeodomain Proteins; D011257:Pregnancy Proteins; C411783:Psx1 protein, mouse