Transcript identification on the CLN5 region on chromosome 13q22.

Our efforts to clone the CLN5 gene, mutated in a severe children's brain disease, variant late infantile neuronal ceroid lipofuscinosis (vLINCL, MIM256731), resulted in large-scale sequencing of genomic clones flanking the critical chromosomal region on 13q22. Computational and traditional transcript identification analyses of the resulting sequence were used to identify the disease gene. In addition to the identification of the CLN5 gene, this effort produced a large amount of genomic sequence data. Here, we report a transcription map of the 107 kb sequence in the CLN5 region, based on traditional and computational gene identification strategies. Several transcripts were identified in this sequence. Queries against the database of expressed sequence tags proved to be the most powerful tool for gene identification from large-scale sequence.