Interruption of an alpha-satellite array by a short member of the KpnI family of interspersed, highly repeated monkey DNA sequences.
We describe here the interruption of a cloned African green monkey alpha-satellite array by an 829-base-pair-long nonsatellite DNA segment. Hybridization experiments indicate that the sequences within the interruption are homologous to segments frequently found in the 6-kilobase-pair-long members of the KpnI family of long, interspersed repeats. These data confirm and extend earlier results suggesting that sequences common to the KpnI family can occur independently of one another and in segments of variable lengths. The 829-base-pair-long segment, which is termed KpnI-RET, contains a terminal stretch of adenosine residues preceded by two typical but overlapping polyadenylation sites. KpnI-RET is flanked by direct repeats of a 14-base-pair-long segment of alpha-satellite that occurs only once in the satellite consensus sequence. These structural features suggest that KpnI-RET was inserted into the satellite array as a movable element.
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