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Brain-specific genes have identifier sequences in their introns.

R J Milner, F E Bloom, C Lai

Proceedings of the National Academy of Sciences of the United States of America

|February 1, 1984

Summary

Identifier (ID) sequences are abundant in the rat genome and found within brain-specific genes. Some ID sequences appear to be mobile genetic elements, indicating they are not exclusively located within brain gene introns.

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Area of Science:

Genomics
Molecular Biology
Neuroscience

Background:

The 82-nucleotide identifier (ID) sequence is found in the rat genome at high copy numbers (1-1.5 X 10^5).
ID sequences are present in cDNA clones of precursors for brain-specific messenger RNAs (mRNAs).

Purpose of the Study:

To investigate the genomic distribution and potential function of identifier (ID) sequences in the rat.
To determine the relationship between ID sequences and brain-specific genes.

Main Methods:

Comparative analysis of 8 ID nucleotide sequences to derive a consensus sequence.
Genomic analysis to determine the copy number and location of ID sequences.

Main Results:

ID sequences are highly abundant in the rat genome.

Related Experiment Videos

Some brain-specific genes contain multiple ID sequences within their introns.

An excess of ID sequences exists compared to brain genes, suggesting some function as mobile elements.

Not all ID sequences are exclusively located within brain gene introns.

Conclusions:

Identifier (ID) sequences are a significant component of the rat genome, with a notable presence in brain-specific gene introns.
The mobile nature of some ID sequences suggests a role beyond simple gene structure, potentially influencing genome dynamics.