Serine/threonine-protein kinase ATR; Probable serine/threonine kinase. Plays a central role in cell-cycle regulation by transmitting DNA damage signals to downstream effectors of cell-cycle progression. May recognize the substrate consensus sequence [ST]-Q and phosphorylate histone variant H2AX to form H2AXS139ph at sites of DNA damage, thereby regulating DNA damage response mechanism. Seems to be required for the G2-phase checkpoint in response to replication blocks but not absolutely required in the G2- arrest response to double-strand breaks. May also be involved in the meiosis proc [...]

Protein BREAST CANCER SUSCEPTIBILITY 2 homolog A; Involved in double-strand break repair and/or homologous recombination by mediating RAD51- and DMC1-facilitated DNA repair. Plays an essential role in both somatic and meiotic homologous recombination. Is crucial for the formation of RAD51 and DMC1 foci during male meiotic homologous recombination in prophase I.

Serine/threonine-protein kinase ATR; Probable serine/threonine kinase. Plays a central role in cell-cycle regulation by transmitting DNA damage signals to downstream effectors of cell-cycle progression. May recognize the substrate consensus sequence [ST]-Q and phosphorylate histone variant H2AX to form H2AXS139ph at sites of DNA damage, thereby regulating DNA damage response mechanism. Seems to be required for the G2-phase checkpoint in response to replication blocks but not absolutely required in the G2- arrest response to double-strand breaks. May also be involved in the meiosis proc [...]

Probable histone H2AXb; Variant histone H2A which replaces conventional H2A in a subset of nucleosomes. Nucleosomes wrap and compact DNA into chromatin, limiting DNA accessibility to the cellular machineries which require DNA as a template. Histones thereby play a central role in transcription regulation, DNA repair, DNA replication and chromosomal stability. DNA accessibility is regulated via a complex set of post- translational modifications of histones, also called histone code, and nucleosome remodeling. Required for checkpoint-mediated arrest of cell cycle progression in response [...]

Serine/threonine-protein kinase ATR; Probable serine/threonine kinase. Plays a central role in cell-cycle regulation by transmitting DNA damage signals to downstream effectors of cell-cycle progression. May recognize the substrate consensus sequence [ST]-Q and phosphorylate histone variant H2AX to form H2AXS139ph at sites of DNA damage, thereby regulating DNA damage response mechanism. Seems to be required for the G2-phase checkpoint in response to replication blocks but not absolutely required in the G2- arrest response to double-strand breaks. May also be involved in the meiosis proc [...]

Poly [ADP-ribose] polymerase 1; Involved in the base excision repair (BER) pathway, by catalyzing the poly(ADP-ribosyl)ation of a limited number of acceptor proteins involved in chromatin architecture and in DNA metabolism. This modification follows DNA damages and appears as an obligatory step in a detection/signaling pathway leading to the reparation of DNA strand breaks (By similarity).

Serine/threonine-protein kinase ATR; Probable serine/threonine kinase. Plays a central role in cell-cycle regulation by transmitting DNA damage signals to downstream effectors of cell-cycle progression. May recognize the substrate consensus sequence [ST]-Q and phosphorylate histone variant H2AX to form H2AXS139ph at sites of DNA damage, thereby regulating DNA damage response mechanism. Seems to be required for the G2-phase checkpoint in response to replication blocks but not absolutely required in the G2- arrest response to double-strand breaks. May also be involved in the meiosis proc [...]

Poly [ADP-ribose] polymerase 2; Involved in the base excision repair (BER) pathway, by catalyzing the poly(ADP-ribosyl)ation of a limited number of acceptor proteins involved in chromatin architecture and in DNA metabolism. This modification follows DNA damages and appears as an obligatory step in a detection/signaling pathway leading to the reparation of DNA strand breaks (By similarity).

Serine/threonine-protein kinase ATR; Probable serine/threonine kinase. Plays a central role in cell-cycle regulation by transmitting DNA damage signals to downstream effectors of cell-cycle progression. May recognize the substrate consensus sequence [ST]-Q and phosphorylate histone variant H2AX to form H2AXS139ph at sites of DNA damage, thereby regulating DNA damage response mechanism. Seems to be required for the G2-phase checkpoint in response to replication blocks but not absolutely required in the G2- arrest response to double-strand breaks. May also be involved in the meiosis proc [...]

Peroxidase 53; Removal of H(2)O(2), oxidation of toxic reductants, biosynthesis and degradation of lignin, suberization, auxin catabolism, response to environmental stresses such as wounding, pathogen attack and oxidative stress. These functions might be dependent on each isozyme/isoform in each plant tissue; Belongs to the peroxidase family. Classical plant (class III) peroxidase subfamily.

Serine/threonine-protein kinase ATR; Probable serine/threonine kinase. Plays a central role in cell-cycle regulation by transmitting DNA damage signals to downstream effectors of cell-cycle progression. May recognize the substrate consensus sequence [ST]-Q and phosphorylate histone variant H2AX to form H2AXS139ph at sites of DNA damage, thereby regulating DNA damage response mechanism. Seems to be required for the G2-phase checkpoint in response to replication blocks but not absolutely required in the G2- arrest response to double-strand breaks. May also be involved in the meiosis proc [...]

Cell cycle checkpoint protein RAD17; Seems to be involved in regulation of DNA repair correlated to non-homologous double strand breaks (DSBs) repair. In vitro, involved in rapid but not in slow DSB repair mechanism. Required for effective immune responses that involve activation of DNA damage responses.

Serine/threonine-protein kinase ATR; Probable serine/threonine kinase. Plays a central role in cell-cycle regulation by transmitting DNA damage signals to downstream effectors of cell-cycle progression. May recognize the substrate consensus sequence [ST]-Q and phosphorylate histone variant H2AX to form H2AXS139ph at sites of DNA damage, thereby regulating DNA damage response mechanism. Seems to be required for the G2-phase checkpoint in response to replication blocks but not absolutely required in the G2- arrest response to double-strand breaks. May also be involved in the meiosis proc [...]

DNA repair protein RAD51 homolog 1; Binds to single and double-stranded DNA and exhibits DNA- dependent ATPase activity. Unwinds duplex DNA (By similarity). Component of the meiotic recombination pathway. Seems to play a role in mediating chromosome homology search, chromosome pairing and synapsis at early stages and probably chromosome crossing-over at later stages in meiosis. Probably is involved in the repair of meiotic double strand breaks (DBSs) generated by AtSPO11-1 and in homologous recombination. Its function is dispensable for vegetative growth and root mitosis.

Serine/threonine-protein kinase ATR; Probable serine/threonine kinase. Plays a central role in cell-cycle regulation by transmitting DNA damage signals to downstream effectors of cell-cycle progression. May recognize the substrate consensus sequence [ST]-Q and phosphorylate histone variant H2AX to form H2AXS139ph at sites of DNA damage, thereby regulating DNA damage response mechanism. Seems to be required for the G2-phase checkpoint in response to replication blocks but not absolutely required in the G2- arrest response to double-strand breaks. May also be involved in the meiosis proc [...]

DNA repair protein RAD51 homolog 4; Involved in the homologous recombination repair (HRR) pathway of double-stranded DNA breaks arising during DNA replication or induced by DNA-damaging agents.

Serine/threonine-protein kinase ATR; Probable serine/threonine kinase. Plays a central role in cell-cycle regulation by transmitting DNA damage signals to downstream effectors of cell-cycle progression. May recognize the substrate consensus sequence [ST]-Q and phosphorylate histone variant H2AX to form H2AXS139ph at sites of DNA damage, thereby regulating DNA damage response mechanism. Seems to be required for the G2-phase checkpoint in response to replication blocks but not absolutely required in the G2- arrest response to double-strand breaks. May also be involved in the meiosis proc [...]

Structural maintenance of chromosomes protein 5; Core component of the SMC5-SMC6 complex that promotes sister chromatid alignment after DNA damage and facilitates double-stranded DNA breaks (DSBs) repair via homologous recombination between sister chromatids; Belongs to the SMC family. SMC5 subfamily.

Serine/threonine-protein kinase ATR; Probable serine/threonine kinase. Plays a central role in cell-cycle regulation by transmitting DNA damage signals to downstream effectors of cell-cycle progression. May recognize the substrate consensus sequence [ST]-Q and phosphorylate histone variant H2AX to form H2AXS139ph at sites of DNA damage, thereby regulating DNA damage response mechanism. Seems to be required for the G2-phase checkpoint in response to replication blocks but not absolutely required in the G2- arrest response to double-strand breaks. May also be involved in the meiosis proc [...]

SUPPRESSOR OF GAMMA RESPONSE 1; Transcription factor regulating the transcriptional activation response to gamma irradiation. Required for stem-cell death induced by UVB or by gamma irradiation. Not required for ATM activation, but participates in pathways governed by both ATM and ATR sensor kinases. Involved in DNA damage response (DDR) system that regulates cell cycle arrest. Functional homolog of animal p53. Regulates SMR5 and SMR7 transcription. Regulates DNA repair and cytokinin signaling separately and plays a key role in controlling lateral root formation under genotoxic stress.

Serine/threonine-protein kinase ATR; Probable serine/threonine kinase. Plays a central role in cell-cycle regulation by transmitting DNA damage signals to downstream effectors of cell-cycle progression. May recognize the substrate consensus sequence [ST]-Q and phosphorylate histone variant H2AX to form H2AXS139ph at sites of DNA damage, thereby regulating DNA damage response mechanism. Seems to be required for the G2-phase checkpoint in response to replication blocks but not absolutely required in the G2- arrest response to double-strand breaks. May also be involved in the meiosis proc [...]

Wee1-like protein kinase; Cell cycle regulatory kinase that is not rate-limiting for cycle progression under normal growth conditions. Transcriptionally activated upon DNA stress or damage in an ATR- or ATM-dependent manner. Once activated, inhibits plant growth by arresting dividing cells in the G2 phase before proceeding into mitosis. Down-regulates CDKA-1 and CDKD-2 by tyrosine phosphorylation. May target principally CDKA-1.

Glucan endo-1,3-beta-glucosidase, acidic isoform; Implicated in the defense of plants against pathogens (Probable). Not involved in plasmodesmal callose degradation and in the gating of plasmodesmata during tobamovirus infection. Belongs to the glycosyl hydrolase 17 family.

Protein EDS1; Positive regulator of basal resistance and of effector- triggered immunity specifically mediated by TIR-NB-LRR (TNL) resistance proteins. Disruption by bacterial effector of EDS1-TIR-NB-LRR resistance protein interactions constitutes the first step in resistance activation. Acts redundantly with salicylic acid to regulate resistance gene-mediated signaling. Triggers early plant defenses and hypersensitive response independently of PAD4, and then recruits PAD4 to potentiate plant defenses through the accumulation of salicylic acid. Nuclear localization is essential for bas [...]

Glucan endo-1,3-beta-glucosidase, acidic isoform; Implicated in the defense of plants against pathogens (Probable). Not involved in plasmodesmal callose degradation and in the gating of plasmodesmata during tobamovirus infection. Belongs to the glycosyl hydrolase 17 family.

Isochorismate synthase 1, chloroplastic; Involved in the synthesis of salicylic acid (SA) required for both local and systemic acquired resistance (LAR and SAR) while SA synthesized through the phenylalanine ammonium lyase (PAL) pathway seems to potentiate plant cell death. Also involved in phylloquinone (vitamin K1) synthesis. Has no isochorismate pyruvate lyase (IPL) activity.

Glucan endo-1,3-beta-glucosidase, acidic isoform; Implicated in the defense of plants against pathogens (Probable). Not involved in plasmodesmal callose degradation and in the gating of plasmodesmata during tobamovirus infection. Belongs to the glycosyl hydrolase 17 family.

Regulatory protein NPR1; May act as a substrate-specific adapter of an E3 ubiquitin- protein ligase complex (CUL3-RBX1-BTB) which mediates the ubiquitination and subsequent proteasomal degradation of target proteins (By similarity). Key positive regulator of the SA-dependent signaling pathway that negatively regulates JA-dependent signaling pathway. Mediates the binding of TGA factors to the as-1 motif found in the pathogenesis-related PR-1 gene, leading to the transcriptional regulation of the gene defense. Controls the onset of systemic acquired resistance (SAR). Upon SAR induction, [...]

Glucan endo-1,3-beta-glucosidase, acidic isoform; Implicated in the defense of plants against pathogens (Probable). Not involved in plasmodesmal callose degradation and in the gating of plasmodesmata during tobamovirus infection. Belongs to the glycosyl hydrolase 17 family.

Lipase-like PAD4; Probable lipase required downstream of MPK4 for accumulation of the plant defense-potentiating molecule, salicylic acid, thus contributing to the plant innate immunity against invasive biotrophic pathogens and to defense mechanisms upon recognition of microbe- associated molecular patterns (MAMPs). Participates in the regulation of various molecular and physiological processes that influence fitness. Together with SG101, required for programmed cell death (PCD) triggered by NBS-LRR resistance proteins (e.g. RPS4, RPW8.1 and RPW8.2) in response to the fungal toxin fumo [...]

Glucan endo-1,3-beta-glucosidase, acidic isoform; Implicated in the defense of plants against pathogens (Probable). Not involved in plasmodesmal callose degradation and in the gating of plasmodesmata during tobamovirus infection. Belongs to the glycosyl hydrolase 17 family.

Defensin-like protein 16; Confers broad-spectrum resistance to pathogens. Has antifungal activity in vitro; Belongs to the DEFL family.

Glucan endo-1,3-beta-glucosidase, acidic isoform; Implicated in the defense of plants against pathogens (Probable). Not involved in plasmodesmal callose degradation and in the gating of plasmodesmata during tobamovirus infection. Belongs to the glycosyl hydrolase 17 family.

Putative pathogenesis-related protein 1, 18.9K; Belongs to the CRISP family.

Glucan endo-1,3-beta-glucosidase, acidic isoform; Implicated in the defense of plants against pathogens (Probable). Not involved in plasmodesmal callose degradation and in the gating of plasmodesmata during tobamovirus infection. Belongs to the glycosyl hydrolase 17 family.

Pathogenesis-related protein 1; Partially responsible for acquired pathogen resistance.

Glucan endo-1,3-beta-glucosidase, acidic isoform; Implicated in the defense of plants against pathogens (Probable). Not involved in plasmodesmal callose degradation and in the gating of plasmodesmata during tobamovirus infection. Belongs to the glycosyl hydrolase 17 family.

Pathogenesis-related protein 5; Partially responsible for acquired pathogen resistance.

Glucan endo-1,3-beta-glucosidase, acidic isoform; Implicated in the defense of plants against pathogens (Probable). Not involved in plasmodesmal callose degradation and in the gating of plasmodesmata during tobamovirus infection. Belongs to the glycosyl hydrolase 17 family.

Pathogenesis-related protein 1; Probably involved in the defense reaction of plants against pathogens.