Table 3.

Extra-ribosomal functions of ribosomal proteins of the small subunit of prokaryotic ribosomes (PROK RP). Auto Reg = autologous regulation of ribosomal protein by binding to its own mRNA.

Prok RP	Auto REG	Other Extra-Ribosomal Functions of RP	References
S1	YES	Stimulates RNA polymerase; Phage Qβ replicase	[7,89,90,91]
S2	YES	Regulates rpsB and tsf genes	[7,89]
S3	YES	DNA repair; NF-κB signaling pathway; Apoptosis	[7,92]
S4	YES	Regulates rpsD gene and α operons; Transcription anti-termination; NUS transcription elongation complex	[7,89,90]
S5	YES		[7]
S6	YES		[7]
S7	YES		[7]
S8	YES	Repressor of spc operon	[7,89]
S9	YES	SOS DNA repair system	[7,89,91]
S10	YES	Transcription anti-termination; NUS transcription elongation complex	[7,89,90,91]
S11	YES		[7]
S12	YES	T4 phage RNA chaperone and intron splicing	[7,89,91]
S13	YES		[7]
S15	YES		[89]
S18	YES		[7]
S19	YES		[7]
S20	YES	Inhibition of ornithine and arginine decarboxylase enzymes	[7,89]
S21	YES		[7]
S26	YES		[7]
S28	YES		[7]