Google Releases AlphaGenome Atlas to Map Human Genome Mutations

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Google announced AlphaGenome Atlas on Tuesday, a computational resource designed to predict the consequences of every possible single-base variant in the human genome. Because the human genome is approximately 3 billion bases long, substituting each position with the three alternative DNA bases produces a total of 9 billion variants to evaluate.

The system focuses on non-coding DNA, the portion of the genome that does not encode proteins but accounts for more than 97 percent of its total length. That non-coding region includes regulatory sequences that control where and when genes are active, signals that govern how messenger RNAs are processed, and chromatin-packaging instructions - alongside large stretches of what researchers consider molecular junk left by ancient viral infections. AlphaGenome attempts to characterise sequences across multiple functional dimensions, including gene expression, transcription initiation, chromatin accessibility, histone modifications, transcription factor binding, chromatin contact maps, splice site usage, and splice junction strength.

The tool is currently limited to human and mouse genomes and has been trained on a restricted number of cell types that biologists have studied extensively. Whether AlphaGenome delivers insights beyond what was already embedded in its training data will only become clear once researchers begin applying it at scale.

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