N-acetylserine-responsive cysteine regulon transcriptional activator; This protein is a positive regulator of gene expression for the cysteine regulon, a system of 10 or more loci involved in the biosynthesis of L-cysteine from inorganic sulfate. The inducer for CysB is N-acetylserine. CysB inhibits its own transcription.

Serine acetyltransferase; Protein involved in cysteine biosynthetic process; Belongs to the transferase hexapeptide repeat family.

N-acetylserine-responsive cysteine regulon transcriptional activator; This protein is a positive regulator of gene expression for the cysteine regulon, a system of 10 or more loci involved in the biosynthesis of L-cysteine from inorganic sulfate. The inducer for CysB is N-acetylserine. CysB inhibits its own transcription.

Cystine transporter subunit; Part of the ABC transporter complex FliY-YecC-YecS involved in L-cystine transport. The system can probably also transport L- cysteine, and it mediates accumulation of the toxic compounds L- selenaproline (SCA) and L-selenocystine (SeCys). Binds cystine ; Belongs to the bacterial solute-binding protein 3 family.

N-acetylserine-responsive cysteine regulon transcriptional activator; This protein is a positive regulator of gene expression for the cysteine regulon, a system of 10 or more loci involved in the biosynthesis of L-cysteine from inorganic sulfate. The inducer for CysB is N-acetylserine. CysB inhibits its own transcription.

Putative transporter; Involved in L-cystine transport. Can probably also transport L-cysteine. Mediates accumulation of the toxic compounds L- selenaproline (SCA) and L-selenocystine (SeCys). Belongs to the dicarboxylate/amino acid:cation symporter (DAACS) (TC 2.A.23) family.

Serine acetyltransferase; Protein involved in cysteine biosynthetic process; Belongs to the transferase hexapeptide repeat family.

N-acetylserine-responsive cysteine regulon transcriptional activator; This protein is a positive regulator of gene expression for the cysteine regulon, a system of 10 or more loci involved in the biosynthesis of L-cysteine from inorganic sulfate. The inducer for CysB is N-acetylserine. CysB inhibits its own transcription.

Serine acetyltransferase; Protein involved in cysteine biosynthetic process; Belongs to the transferase hexapeptide repeat family.

Cysteine and O-acetyl-L-serine efflux system; May be an export pump for cysteine and other metabolites of the cysteine pathway (such as N-acetyl-L-serine (NAS) and O-acetyl-L- serine (OAS)), and for other amino acids and their metabolites. Belongs to the EamA transporter family.

Serine acetyltransferase; Protein involved in cysteine biosynthetic process; Belongs to the transferase hexapeptide repeat family.

Glutamate-cysteine ligase; Protein involved in glutathione biosynthetic process; Belongs to the glutamate--cysteine ligase type 1 family. Type 1 subfamily.

D-cysteine desulfhydrase, PLP-dependent; Catalyzes the alpha,beta-elimination reaction of D-cysteine and of several D-cysteine derivatives. It could be a defense mechanism against D-cysteine. Can also catalyze the degradation of 3-chloro-D- alanine.

Cystine transporter subunit; Part of the ABC transporter complex FliY-YecC-YecS involved in L-cystine transport. The system can probably also transport L- cysteine, and it mediates accumulation of the toxic compounds L- selenaproline (SCA) and L-selenocystine (SeCys). Binds cystine ; Belongs to the bacterial solute-binding protein 3 family.

D-cysteine desulfhydrase, PLP-dependent; Catalyzes the alpha,beta-elimination reaction of D-cysteine and of several D-cysteine derivatives. It could be a defense mechanism against D-cysteine. Can also catalyze the degradation of 3-chloro-D- alanine.

Putative transporter; Involved in L-cystine transport. Can probably also transport L-cysteine. Mediates accumulation of the toxic compounds L- selenaproline (SCA) and L-selenocystine (SeCys). Belongs to the dicarboxylate/amino acid:cation symporter (DAACS) (TC 2.A.23) family.

D-cysteine desulfhydrase, PLP-dependent; Catalyzes the alpha,beta-elimination reaction of D-cysteine and of several D-cysteine derivatives. It could be a defense mechanism against D-cysteine. Can also catalyze the degradation of 3-chloro-D- alanine.

Putative ABC transporter ATPase; Part of the ABC transporter complex FliY-YecC-YecS involved in L-cystine transport. The system can probably also transport L- cysteine, and it mediates accumulation of the toxic compounds L- selenaproline (SCA) and L-selenocystine (SeCys). Probably responsible for energy coupling to the transport system (Probable).

D-cysteine desulfhydrase, PLP-dependent; Catalyzes the alpha,beta-elimination reaction of D-cysteine and of several D-cysteine derivatives. It could be a defense mechanism against D-cysteine. Can also catalyze the degradation of 3-chloro-D- alanine.

ABC family putative inner membrane permease; Part of the ABC transporter complex FliY-YecC-YecS involved in L-cystine transport. The system can probably also transport L- cysteine, and it mediates accumulation of the toxic compounds L- selenaproline (SCA) and L-selenocystine (SeCys). Probably responsible for the translocation of the substrate across the membrane (Probable).

Cysteine and O-acetyl-L-serine efflux system; May be an export pump for cysteine and other metabolites of the cysteine pathway (such as N-acetyl-L-serine (NAS) and O-acetyl-L- serine (OAS)), and for other amino acids and their metabolites. Belongs to the EamA transporter family.

Serine acetyltransferase; Protein involved in cysteine biosynthetic process; Belongs to the transferase hexapeptide repeat family.

Cysteine and O-acetyl-L-serine efflux system; May be an export pump for cysteine and other metabolites of the cysteine pathway (such as N-acetyl-L-serine (NAS) and O-acetyl-L- serine (OAS)), and for other amino acids and their metabolites. Belongs to the EamA transporter family.

Putative transporter; Involved in L-cystine transport. Can probably also transport L-cysteine. Mediates accumulation of the toxic compounds L- selenaproline (SCA) and L-selenocystine (SeCys). Belongs to the dicarboxylate/amino acid:cation symporter (DAACS) (TC 2.A.23) family.

Cystine transporter subunit; Part of the ABC transporter complex FliY-YecC-YecS involved in L-cystine transport. The system can probably also transport L- cysteine, and it mediates accumulation of the toxic compounds L- selenaproline (SCA) and L-selenocystine (SeCys). Binds cystine ; Belongs to the bacterial solute-binding protein 3 family.

N-acetylserine-responsive cysteine regulon transcriptional activator; This protein is a positive regulator of gene expression for the cysteine regulon, a system of 10 or more loci involved in the biosynthesis of L-cysteine from inorganic sulfate. The inducer for CysB is N-acetylserine. CysB inhibits its own transcription.

Cystine transporter subunit; Part of the ABC transporter complex FliY-YecC-YecS involved in L-cystine transport. The system can probably also transport L- cysteine, and it mediates accumulation of the toxic compounds L- selenaproline (SCA) and L-selenocystine (SeCys). Binds cystine ; Belongs to the bacterial solute-binding protein 3 family.

D-cysteine desulfhydrase, PLP-dependent; Catalyzes the alpha,beta-elimination reaction of D-cysteine and of several D-cysteine derivatives. It could be a defense mechanism against D-cysteine. Can also catalyze the degradation of 3-chloro-D- alanine.

Cystine transporter subunit; Part of the ABC transporter complex FliY-YecC-YecS involved in L-cystine transport. The system can probably also transport L- cysteine, and it mediates accumulation of the toxic compounds L- selenaproline (SCA) and L-selenocystine (SeCys). Binds cystine ; Belongs to the bacterial solute-binding protein 3 family.

Putative transporter; Involved in L-cystine transport. Can probably also transport L-cysteine. Mediates accumulation of the toxic compounds L- selenaproline (SCA) and L-selenocystine (SeCys). Belongs to the dicarboxylate/amino acid:cation symporter (DAACS) (TC 2.A.23) family.

Cystine transporter subunit; Part of the ABC transporter complex FliY-YecC-YecS involved in L-cystine transport. The system can probably also transport L- cysteine, and it mediates accumulation of the toxic compounds L- selenaproline (SCA) and L-selenocystine (SeCys). Binds cystine ; Belongs to the bacterial solute-binding protein 3 family.

Putative ABC transporter ATPase; Part of the ABC transporter complex FliY-YecC-YecS involved in L-cystine transport. The system can probably also transport L- cysteine, and it mediates accumulation of the toxic compounds L- selenaproline (SCA) and L-selenocystine (SeCys). Probably responsible for energy coupling to the transport system (Probable).

Cystine transporter subunit; Part of the ABC transporter complex FliY-YecC-YecS involved in L-cystine transport. The system can probably also transport L- cysteine, and it mediates accumulation of the toxic compounds L- selenaproline (SCA) and L-selenocystine (SeCys). Binds cystine ; Belongs to the bacterial solute-binding protein 3 family.

ABC family putative inner membrane permease; Part of the ABC transporter complex FliY-YecC-YecS involved in L-cystine transport. The system can probably also transport L- cysteine, and it mediates accumulation of the toxic compounds L- selenaproline (SCA) and L-selenocystine (SeCys). Probably responsible for the translocation of the substrate across the membrane (Probable).

Glutaredoxin 1, redox coenzyme for ribonucleotide reductase (RNR1a); The disulfide bond functions as an electron carrier in the glutathione-dependent synthesis of deoxyribonucleotides by the enzyme ribonucleotide reductase. In addition, it is also involved in reducing some disulfide bonds in a coupled system with glutathione reductase; Belongs to the glutaredoxin family.

Glutamate-cysteine ligase; Protein involved in glutathione biosynthetic process; Belongs to the glutamate--cysteine ligase type 1 family. Type 1 subfamily.

Glutaredoxin 1, redox coenzyme for ribonucleotide reductase (RNR1a); The disulfide bond functions as an electron carrier in the glutathione-dependent synthesis of deoxyribonucleotides by the enzyme ribonucleotide reductase. In addition, it is also involved in reducing some disulfide bonds in a coupled system with glutathione reductase; Belongs to the glutaredoxin family.

Catalase HPII, heme d-containing; Decomposes hydrogen peroxide into water and oxygen; serves to protect cells from the toxic effects of hydrogen peroxide.

Glutaredoxin 1, redox coenzyme for ribonucleotide reductase (RNR1a); The disulfide bond functions as an electron carrier in the glutathione-dependent synthesis of deoxyribonucleotides by the enzyme ribonucleotide reductase. In addition, it is also involved in reducing some disulfide bonds in a coupled system with glutathione reductase; Belongs to the glutaredoxin family.

Catalase-peroxidase HPI, heme b-containing; Bifunctional enzyme with both catalase and broad-spectrum peroxidase activity. Displays also NADH oxidase, INH lyase and isonicotinoyl-NAD synthase activity; Belongs to the peroxidase family. Peroxidase/catalase subfamily.