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从编码随机15肽序列的噬菌体表面展示文库中,筛选得到了与纤维素有特异亲和能力的噬菌体克隆。序列分析结果表明,这些噬菌体克隆编码的氨基酸序列中芳香族氨基酸残基高度保守,与天然纤维素结合结构域的结构有一定的类似性。利用重组噬菌体研究的结果表明,包含SWYL序列的噬菌体克隆与纤维素的结合能力最强,而其他包含类似结构的噬菌体克隆,包括有两个半胱氨酸的噬菌体克隆(XCWYGNCX、XCWYGECX)及含两个类似结构的噬菌体克隆(XSWYDXXSWFSX)与纤维素的特异亲和能力较低。初步的实验结果显示SWYL序列具有一定的纤维素结合能力,为纤维素结合结构基元的进一步研究打下基础。
Phage clones with specific affinity to cellulose were screened from a phage display library encoding random 15 peptide sequences. Sequence analysis showed that the amino acid residues encoded by these phage clones were highly conserved and had similarities with the structure of native cellulose binding domains. The results of the study using recombinant phage showed that the phage clones containing the SWYL sequence had the strongest binding ability to cellulose, whereas other phage clones containing similar structures included phage clones with two cysteines (XCWYGNCX, XCWYGECX) The two phage clones with similar structure (XSWYDXXSWFSX) have lower specific affinity with cellulose. Preliminary experimental results show that the SWYL sequence has certain cellulose binding ability, which lays the foundation for the further study of cellulose binding structural motifs.