What is NB LRR proteins?
What is NB LRR proteins?
The NBS-LRR proteins are encoded by one of the largest and most important gene family involved in disease resistance in plants. The NBS-LRR proteins comprised of amino-terminal variable domain, a central nucleotide-binding site (NBS) and carboxy-terminal leucine-rich repeats (LRR) domain.
What are NBS-LRR genes?
Nucleotide-binding site–leucine-rich repeat (NBS-LRR) genes are the largest group of plant R genes, and they play important roles in plant defense responses to various pathogens. In this study, 167 NBS-LRR genes were identified from the D. rotundata genome.
What are NB-LRR proteins and what do they do?
In response to effectors, plants have evolved NB-LRR (Nucleotide-binding site, Leucine-rich repeat) proteins that are the most common disease resistance ( R) genes. NB-LRR proteins recognize effectors and initiate Effector Triggered Immunity or ETI [ 1 ].
What is the function of NBS-LRR in plants?
The function of these proteins is not known, but they have the potential to act as adaptors or regulators of TNL and CNL proteins. NBS-LRR proteins are some of the largest proteins known in plants, ranging from about 860 to about 1,900 amino acids.
How is variation generated in the NBS-LRR gene?
Variation is generated by normal genetic mechanisms, including unequal crossing-over, sequence exchange, and gene conversion, rather than genetic events particular to NBS-LRR-encoding genes [ 3, 19 – 21 ]. The rate of evolution of NBS-LRR-encoding genes can be rapid or slow, even within an individual cluster of similar sequences.
What is the role of the CC domain in NLRs?
Forward studies revealed that the CC or TIR domains of NLRs formed a homo- or heteromeric complex that was associated with a chaperone and one or more WRKYs simultaneously to activate the downstream signal (Maekawa et al ., 2011; Shirasu, 2009; Tran et al ., 2017 ).