γ‐N‐Methylasparagine in phycobiliproteins from the cyanobacteria Mastigocladus laminosus and Calothrix

[摘要]

Reinvestigation of the amino acid sequences of all phycobiliproteins from Mastigocladus laminosus showed that there is a post-translationally modified asparagine residue at position 72 of the phycobiliprotein subunits β^PC, β^AP and β^16.2. This residue was identified as γ-N-methylasparagine and it was also found in β^PE of Calothrix. This study also revealed some differences in the amino acid sequences β^AP and β^PC compared to the published data.

[学科分类] 生物化学/生物物理

[关键词] γ-N-Methylasparagine;Posttranslational modification;Phycobiliprotein;Amino acid sequence;(Mastigocladus laminosus;Calothrix);AP;allophycocyanin;PC;C-phycocyanin;PEC;phycoerythrocyanin;PE;C-phycoerythrin;α and β;subunits of phycobiliproteins;L8.9 C;linker polypeptide of the AP core