GlmZ (formally known as SraJ) is a small non-coding RNA (ncRNA).

This ncRNA was discovered in the bacteria Escherichia coli during a large scale computational screen for transcription signals and genomic features of known small RNA-encoding genes.

[1] During this screen 14 novel ncRNA genes were identified, including SraB, SraC, SraD and SraG.

Northern blot analysis also indicated this RNA undergoes specific cleavage processing.

The GlmZ sRNA has been shown to positively control the synthesis of GlmS mRNA.