TY - JOUR

T1 - cDNA cloning, mRNA distribution and heterogeneity, chromosomal location, and RFLP analysis of human osteopontin (OPN)

AU - Young, M F

AU - Kerr, J M

AU - Termine, J D

AU - Wewer, U M

AU - Wang, M G

AU - McBride, O W

AU - Fisher, L W

PY - 1990/8/1

Y1 - 1990/8/1

N2 - A human osteopontin (OP) cDNA was isolated from a library made from primary cultures of human bone cells. The distribution of osteopontin mRNA in human tissues was investigated by Northern analysis and showed that the human message was predominant in cultures of bone cells and in decidua cells isolated at 6-12 weeks of gestation. Immunohistochemical analysis confirmed that OP expression is high in decidua cells as well as in the endometrial glands of a non-pregnant secretory-phase human uterus. Two variants of the OP message were evident on the basis of DNA sequencing and polymerase chain reaction amplification of bone and decidua cell mRNA. The peptides potentially translated by the variant messages differ by the presence (OP1b) or absence (OP1a) of 14 amino acids at residue 58 of the molecule. The deduced human protein sequence shows a conservation between species in the position of the Arg-Gly-Asp (RGD) cell attachment site. Chromosomal mapping of the osteopontin gene (OPN) using human-rodent cell hybrids demonstrated a location on chromosome 4 in the human genome. In situ hybridization of metaphase chromosomes using radiolabeled OP1a as a probe indicated that the gene is located on a region of 4q that is near the centromere. A high-frequency restriction fragment length polymorphism was evident in the DNA from 29 unrelated individuals using the enzyme BglII. Analysis of total genomic DNA by digestion with several restriction enzymes, Southern blotting, and hybridization with the human osteopontin cDNA indicated that the gene is a single copy with an approximate length of 5.4-8.2 kb.

AB - A human osteopontin (OP) cDNA was isolated from a library made from primary cultures of human bone cells. The distribution of osteopontin mRNA in human tissues was investigated by Northern analysis and showed that the human message was predominant in cultures of bone cells and in decidua cells isolated at 6-12 weeks of gestation. Immunohistochemical analysis confirmed that OP expression is high in decidua cells as well as in the endometrial glands of a non-pregnant secretory-phase human uterus. Two variants of the OP message were evident on the basis of DNA sequencing and polymerase chain reaction amplification of bone and decidua cell mRNA. The peptides potentially translated by the variant messages differ by the presence (OP1b) or absence (OP1a) of 14 amino acids at residue 58 of the molecule. The deduced human protein sequence shows a conservation between species in the position of the Arg-Gly-Asp (RGD) cell attachment site. Chromosomal mapping of the osteopontin gene (OPN) using human-rodent cell hybrids demonstrated a location on chromosome 4 in the human genome. In situ hybridization of metaphase chromosomes using radiolabeled OP1a as a probe indicated that the gene is located on a region of 4q that is near the centromere. A high-frequency restriction fragment length polymorphism was evident in the DNA from 29 unrelated individuals using the enzyme BglII. Analysis of total genomic DNA by digestion with several restriction enzymes, Southern blotting, and hybridization with the human osteopontin cDNA indicated that the gene is a single copy with an approximate length of 5.4-8.2 kb.

KW - Amino Acid Sequence

KW - Animals

KW - Base Sequence

KW - Cattle

KW - Chromosome Mapping

KW - Chromosomes, Human, Pair 4

KW - Cloning, Molecular

KW - DNA

KW - Decidua

KW - Endometrium

KW - Female

KW - Genes

KW - Humans

KW - Hybrid Cells

KW - Molecular Sequence Data

KW - Osteopontin

KW - Polymerase Chain Reaction

KW - Polymorphism, Restriction Fragment Length

KW - Pregnancy

KW - RNA, Messenger

KW - Rats

KW - Sialoglycoproteins

M3 - Journal article

C2 - 1974876

VL - 7

SP - 491

EP - 502

JO - Genomics

JF - Genomics

SN - 0888-7543

IS - 4

ER -