Discovery and Characterization of a Novel Psychrophilic Alginate Lyase Belonging to the New PL7_7 Subfamily

, which is critical for enzymatic activity. This disulfide motif appears to be unique to the PL7_7 subfamily. This work broadens the diversity known within the PL7 family and provides a promising cold-adapted biocatalyst with potential applications in food, agricultural, and biomedical industries.