Carcinoembryonic antigen gene family: molecular cloning of cDNA for a PS beta G/FL-NCA glycoprotein with a novel domain arrangement.
Human fetal liver contains a family of carcinoembryonic antigen related glycoproteins called the pregnancy specific beta 1 glycoprotein/fetal liver non specific cross-reactive antigen (PS beta G/FL-NCA) glycoprotein family. The sequence for the major FL-NCA species has been reported [Khan et al., Proc. Natl. Acad. Sci. USA 1989, 86 in press]. Two additional CEA-related fetal liver glycoproteins FL-NCA-2 and 3 were cloned, sequenced and expressed. FL-NCA-3 is a new gene family member. It has a unique domain arrangement (N-A2-B2-T) and contains a hydrophobic tail. FL-NCA-3 has a molecular weight of approximately 54 kD and is released from the transfected cells. Like three other members of the family, FL-NCA-3 contains the Arg-Gly-Asp sequence in a position in the N-domain corresponding to complementarity determining region 3 of immunoglobulin. FL-NCA-2 is identical in structure to PS beta G-D previously found in placenta. The PS beta G/FL-NCA glycoprotein family may be involved in processes related to cell adhesion and cell differentiation.
Khan
W N
WN
Department of Immunology, University of Umeå, Sweden.
Hammarström
S
S
D000595:Amino Acid Sequence; D001483:Base Sequence; D015139:Blotting, Southern; D002272:Carcinoembryonic Antigen / Q000235:genetics*; D003001:Cloning, Molecular; D004247:DNA / Q000235:genetics; D005109:Extracellular Matrix / Q000502:physiology; D006367:HeLa Cells; D008099:Liver / Q000196:embryology* / Q000502:physiology; D008969:Molecular Sequence Data; D005810:Multigene Family; D011257:Pregnancy Proteins / Q000235:genetics*
D002272:Carcinoembryonic Antigen; D011257:Pregnancy Proteins; D004247:DNA