Part:BBa_K4990007

HlpA

Protein Seq:MANKQDLIAKVAEATELTKKDSAAAVDAVFSTIEAFLAEGEKVQLIGFGNFEVRERAARK GRNPQTGAEIEIAASKVPAFKAGKALKDAVK

What you need to know!

2006年Tjalsma通过Highly accurate tandem MS方法，找到了一种蛋白Histone-like protein A(HlpA),发现它联系Streptococcus bovis和结直肠癌的桥梁，并推测S.bovis正是通过HlpA与结直肠癌细胞表面的heparan sulfate-proteoglycans(HSPG)结合，介导的S.bovis定植于结直肠癌[1]。

2009年Boleij证明了Streptococcus gallolyticus通过HlpA于结直肠癌细胞表面的HSPG结合[2]。

2016年O'Neil得到了Hlp的晶体结构，指示Hlp为类似蟹钳的结构，钳子部分的碱性氨基酸可以与DNA结合，同时也可以与肝素结合[3]。

2018年Chun Loong Ho利用HlpA与HSPG的结合，构建了一种可以靶向结直肠癌的工程大肠杆菌，拉开了HlpA靶向系统的序幕[4]。

2022年 iGEM22_LZU-CHINA[1]团队，通过合成生物学构建了靶向结直肠癌的大肠杆菌，方法为HlpA靶向肿瘤细胞表面的HSPG[5]。

2023年Tang构建了利用HlpA靶向，Azurin杀伤的工程益生菌，并在结直肠癌小鼠中展现出不错的疗效[6]。

Figure 1:Western blot result of HlyE under different promoter control

Referrence

[1]Tjalsma H, Schöller‐Guinard M, Lasonder E, et al. Profiling the humoral immune response in colon cancer patients: diagnostic antigens from Streptococcus bovis[J]. International journal of cancer, 2006, 119(9): 2127-2135.

[2]Boleij A, Schaeps R M J, de Kleijn S, et al. Surface-exposed histone-like protein a modulates adherence of Streptococcus gallolyticus to colon adenocarcinoma cells[J]. Infection and immunity, 2009, 77(12): 5519-5527.

[3]O'Neil P, Lovell S, Mehzabeen N, et al. Crystal structure of histone-like protein from Streptococcus mutans refined to 1.9 Å resolution[J]. Acta Crystallographica Section F: Structural Biology Communications, 2016, 72(4): 257-262.

[4]Ho C L, Tan H Q, Chua K J, et al. Engineered commensal microbes for diet-mediated colorectal-cancer chemoprevention[J]. Nature biomedical engineering, 2018, 2(1): 27-37.

[5]https://2022.igem.wiki/lzu-china/[2]

[6] Sequence and Features

Assembly Compatibility:

• 10
  COMPATIBLE WITH RFC[10]
• 12
  COMPATIBLE WITH RFC[12]
• 21
  COMPATIBLE WITH RFC[21]
• 23
  COMPATIBLE WITH RFC[23]
• 25
  INCOMPATIBLE WITH RFC[25]

  Illegal NgoMIV site found at 231
  
• 1000
  COMPATIBLE WITH RFC[1000]