Assignment of the human small inducible cytokine A2 gene, SCYA2 (encoding JE or MCP-1), to 17q11.2-12: evolutionary relatedness of cytokines clustered at the same locus.
The JE gene, cloned from platelet-derived growth factor (PDGF)-treated mouse 3T3 cells, was the first PDGF-inducible gene to be described. Its human homolog (gene name "small inducible cytokine A2" [SCYA2]) encodes the monocyte specific chemotactic factor MCP-1 (or MCAF) which is structurally related to a recently described family of cytokines. By a combination of in situ hybridization and study of somatic cell hybrids, we have assigned the human SCYA2 gene to 17q11.2-12, the locus to which other members of this family have been mapped. We have also reconstructed a phylogenetic tree relating the members of this family to each other and to their murine homologs which suggests that these genes arose by duplication and divergence prior to the murine/human divergence. Four of the five members of this subfamily have now been assigned to the same locus (and the fifth to chromosome 17), while several of the members of a related gene family have been assigned to 4q. We propose that the two subfamilies be designated the 17q and 4q subfamilies.
Rollins
B J
BJ
Division of Medicine, Dana-Farber Cancer Institute, Harvard Medical School, Boston, Massachusetts 02115.
Morton
C C
CC
Ledbetter
D H
DH
Eddy
R L
RL
Shows
T B
TB
D000595:Amino Acid Sequence; D005075:Biological Evolution; D018932:Chemokine CCL2; D002630:Chemotactic Factors / Q000235:genetics*; D002874:Chromosome Mapping; D002886:Chromosomes, Human, Pair 17; D006801:Humans; D008969:Molecular Sequence Data; D005810:Multigene Family; D009693:Nucleic Acid Hybridization; D016415:Sequence Alignment
D018932:Chemokine CCL2; D002630:Chemotactic Factors