Plant pathogens are divided into three groups

Biotrophs derive energy from living cells, they are found on or in living plants, can have very complex nutrient requirements and do not kill host plants rapidly;

Necrotrophs derive energy from killed cells; they invade and kill plant tissue rapidly and then live saprotrophically on the dead remains;

TLS Online TPP Program

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#XL - Q Biochemistry

TLS Online TPP Program

#Id: 8341

#XL - Q Biochemistry

Two major classes of actin-nucleating proteins:

1. Formins nucleate the assembly of unbranched filaments 

2. Arp2/3 complex nucleates the assembly of branched actin networks

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#XL - Q Biochemistry

Gelsolin, is regulated by Ca+2 ion concentration and sever actin filaments.

TLS Online TPP Program

#Id: 8339

#XL - Q Biochemistry

Filament capping proteins:

CapZ blocks (+)end Tropomodulin blocks (-)end

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#Id: 8338

#XL - Q Biochemistry

Profilin can bind proteins with sequences rich in proline residues at the same time it is bound to actin.

TLS Online TPP Program

#Id: 8337

#XL - Q Biochemistry

Profilin – G-actin nucleotide exchange (ADP to ATP) 

Cofilin – F-actin disassembly

Thymosin B-4 – G-actin monomer sequestering