This family is a putative ribosomal protein leader

Ribosomal protein leader

A ribosomal protein leader is a mechanism used in cells to control the cellular concentraction of a protein that forms a part of the ribosome, and to make sure that the concentration is neither too high nor too low. Ribosomal protein leaders are RNA sequences that are a part of the 5' UTR of mRNAs...

 autoregulatory structure found in B. subtilis and other low-GC Gram-positive

Gram-positive

Gram-positive bacteria are those that are stained dark blue or violet by Gram staining. This is in contrast to Gram-negative bacteria, which cannot retain the crystal violet stain, instead taking up the counterstain and appearing red or pink...

 bacteria

Bacteria

Bacteria are a large domain of prokaryotic microorganisms. Typically a few micrometres in length, bacteria have a wide range of shapes, ranging from spheres to rods and spirals...

. It is located in the 5' untranslated regions of mRNAs encoding ribosomal protein L21, a protein of unknown function, and ribosomal protein L27 (rplU-ysxB-rpmA).

Other ribosomal protein leaders identified in the same study include those for L10

Ribosomal protein L10 leader

This family is a putative ribosomal protein leader autoregulatory structure found in B. subtilis and other low-GC Gram-positive bacteria. It is located in the 5' untranslated regions of mRNAs encoding ribosomal proteins L10 and L12...

, L13

Ribosomal protein L13 leader

This family is a putative ribosomal protein leader autoregulatory structure found in B. subtilis and other low-GC Gram-positive bacteria. It is located in the 5' untranslated regions of mRNAs encoding the L13-S9 ribosomal protein operon....

, L19

Ribosomal protein L19 leader

This family is a putative ribosomal protein leader autoregulatory structure found in B. subtilis and other low-GC Gram-positive bacteria. It is located in the 5' untranslated regions of mRNAs encoding ribosomal protein L19 ....

 and L20

Ribosomal protein L20 leader

This family is a putative ribosomal protein leader autoregulatory structure found in B. subtilis and other low-GC Gram-positive bacteria. It is located in the 5' untranslated regions of mRNAs encoding initiation factor 3 followed by ribosomal proteins L35 and L20...

.