Cold shock proteins (e.g., CspA) help bacteria survive low temperatures by:
Cold shock from abrupt downshift to 10 to 20 degrees stabilizes mRNA secondary structures such as hairpins and pseudoknots in the 5 prime untranslated region, blocking 30S ribosome binding and causing premature transcription termination. Bacteria produce abundant small cold shock proteins CspA to CspI, members of 7 kDa single-stranded nucleic acid binding family with conserved cold-shock domain containing RNP motifs binding RNA cooperatively. These act as RNA chaperones destabilizing inhibitory structures, melting hairpins and exposing Shine-Dalgarno ribosome binding site as accessible single
Ref: Prescott's Microbiology, 11th ed., Chapter 7: Cold Shock Proteins and Translation Initiation Enhancement.