Difference between revisions of "Part:BBa K4165004"
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This part encodes the truncated monomer of serine protease HtrA1 present in the human brain. This enzyme is involved in many biological functions ranging from regulating the transforming growth factor (TGF) pathway to degrading fibronectin. It mainly consists of four domains (Kazal - IGFBP - PDZ - Catalytic) all of which have different functions. We used the truncated version as it only contains the PDZ and catalytic domain necessary for its proteolytic activity in our system.
 
This part encodes the truncated monomer of serine protease HtrA1 present in the human brain. This enzyme is involved in many biological functions ranging from regulating the transforming growth factor (TGF) pathway to degrading fibronectin. It mainly consists of four domains (Kazal - IGFBP - PDZ - Catalytic) all of which have different functions. We used the truncated version as it only contains the PDZ and catalytic domain necessary for its proteolytic activity in our system.
  
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This protease is proven to degrade Tau (BBa_K4165009) and amyloid beta (Aβ) (BBa_K4165005) which are the main two proteins responsible for the pathogenesis of Alzheimer’s Disease (AD). Its presence both intra and extracellularly along with its ATP-independent characteristics make it a very suitable candidate to be used and target various diseases caused by certain proteins.
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This protease is proven to degrade Tau (BBa_K4165009) and amyloid beta (Aβ) (BBa_K4165005) which are the main two proteins responsible for the pathogenesis of Alzheimer’s Disease (AD). Its presence both intra and extracellularly along with its ATP-independent characteristics make it a very suitable candidate to be used and target various diseases caused by certain proteins.  
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Due to the structure and function of HTRA1, we benefited from this system and its features to make our plug sink system.  
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                                 Figure 1.: Predicted 3D structure of truncated HtrA1 trimer
 
                                 Figure 1.: Predicted 3D structure of truncated HtrA1 trimer
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ΔG = -25
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ΔG = -25.0
  
 
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                                 Figure 3.: Docked structure of HtrA1 with SPINK8 inhibitor
 
                                 Figure 3.: Docked structure of HtrA1 with SPINK8 inhibitor
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                                 Figure 4.: Docked structure of HtrA1 with WAP inhibitor
 
                                 Figure 4.: Docked structure of HtrA1 with WAP inhibitor
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ΔG = -41.09
 
ΔG = -41.09
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                                 Figure 5.: Docked structure of HtrA1 with Switch 10
 
                                 Figure 5.: Docked structure of HtrA1 with Switch 10
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                                 Figure 6.: Docked structure of HtrA1 with Switch 12
 
                                 Figure 6.: Docked structure of HtrA1 with Switch 12
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                                 Figure 7.: Docked structure of HtrA1 with Switch 12
 
                                 Figure 7.: Docked structure of HtrA1 with Switch 12
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                                 Figure 8.: Docked structure of HtrA1 with Switch 15
 
                                 Figure 8.: Docked structure of HtrA1 with Switch 15
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                                 Figure 9.: Docked structure of HtrA1 with Switch 18
 
                                 Figure 9.: Docked structure of HtrA1 with Switch 18
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Revision as of 20:16, 10 October 2022

Truncated Serine Protease HtrA1

This basic part encodes for truncated human high-temperature requirement A1 serine protease (HtrA1) which can degrade a variety of targets including extracellular matrix proteins.

Usage and Biology

This part encodes the truncated monomer of serine protease HtrA1 present in the human brain. This enzyme is involved in many biological functions ranging from regulating the transforming growth factor (TGF) pathway to degrading fibronectin. It mainly consists of four domains (Kazal - IGFBP - PDZ - Catalytic) all of which have different functions. We used the truncated version as it only contains the PDZ and catalytic domain necessary for its proteolytic activity in our system.

This protease is proven to degrade Tau (BBa_K4165009) and amyloid beta (Aβ) (BBa_K4165005) which are the main two proteins responsible for the pathogenesis of Alzheimer’s Disease (AD). Its presence both intra and extracellularly along with its ATP-independent characteristics make it a very suitable candidate to be used and target various diseases caused by certain proteins.


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 72
  • 1000
    COMPATIBLE WITH RFC[1000]


Dry Lab Characterization

Modeling

After a long time of searching, we couldn't find any model for the HTRA1 monomer which contains whole PDZ domain so we modeled the HTRA1 monomer through multiple modeling tools (Alphafold – TrRrosetta – Rosettafold – iTASSER) to get the best model that we then trimerized using Cluspro server. 

                                Figure 1.: Predicted 3D structure of truncated HtrA1 trimer


Docking

ΔG = -32.325 

                                Figure 2.: Docked structure of HtrA1 with PDZ binding peptide 1


ΔG = -25.0 

                                Figure 3.: Docked structure of HtrA1 with SPINK8 inhibitor


ΔG = -38.18 

                                Figure 4.: Docked structure of HtrA1 with WAP inhibitor


ΔG = -41.09 

                                Figure 5.: Docked structure of HtrA1 with Switch 10


ΔG = -43.15 

                                Figure 6.: Docked structure of HtrA1 with Switch 12


ΔG = -43.15 

                                Figure 7.: Docked structure of HtrA1 with Switch 12


ΔG = -41.04 

                                Figure 8.: Docked structure of HtrA1 with Switch 15


ΔG = -42.38 

                                Figure 9.: Docked structure of HtrA1 with Switch 18


References

1- Eigenbrot, C., Ultsch, M., Lipari, M. T., Moran, P., Lin, S. J., Ganesan, R., ... & Kirchhofer, D. (2012). Structural and functional analysis of HtrA1 and its subdomains. Structure, 20(6), 1040-1050.

2- Clausen, T., Southan, C. & Ehrmann, M. Mol. Cell 10, 443–455 (2002)

3- Perona, J.J. & Craik, C.S. J. Biol. Chem. 272, 29987–29990 (1997).

4- Truebestein, L., Tennstaedt, A., Mönig, T., Krojer, T., Canellas, F., Kaiser, M., ... & Ehrmann, M. (2011). Substrate-induced remodeling of the active site regulates human HTRA1 activity. Nature structural & molecular biology, 18(3), 386-388.