Exact Mass: 259.1433

Exact Mass Matches: 259.1433

Found 180 metabolites which its exact mass value is equals to given mass value 259.1433, within given mass tolerance error 0.01 dalton. Try search metabolite list with more accurate mass tolerance error 0.001 dalton.

Isoleucyl-Glutamine

2-[(2-Amino-1-hydroxy-3-methylpentylidene)amino]-4-(C-hydroxycarbonimidoyl)butanoate

C11H21N3O4 (259.1532)

Isoleucyl-Glutamine is a dipeptide composed of isoleucine and glutamine. It is an incomplete breakdown product of protein digestion or protein catabolism. Some dipeptides are known to have physiological or cell-signaling effects although most are simply short-lived intermediates on their way to specific amino acid degradation pathways following further proteolysis. This dipeptide has not yet been identified in human tissues or biofluids and so it is classified as an Expected metabolite.

Glutaminylisoleucine

(2S,3S)-2-{[(2S)-2-amino-1-hydroxy-4-(C-hydroxycarbonimidoyl)butylidene]amino}-3-methylpentanoate

C11H21N3O4 (259.1532)

Glutaminylisoleucine is a dipeptide composed of glutamine and isoleucine. It is an incomplete breakdown product of protein digestion or protein catabolism. Some dipeptides are known to have physiological or cell-signaling effects although most are simply short-lived intermediates on their way to specific amino acid degradation pathways following further proteolysis.

Glutaminylleucine

(2S)-2-{[(2S)-2-amino-1-hydroxy-4-(C-hydroxycarbonimidoyl)butylidene]amino}-4-methylpentanoate

C11H21N3O4 (259.1532)

Glutaminylleucine is a dipeptide composed of glutamine and leucine. It is an incomplete breakdown product of protein digestion or protein catabolism. Some dipeptides are known to have physiological or cell-signaling effects although most are simply short-lived intermediates on their way to specific amino acid degradation pathways following further proteolysis.

Hydroxyprolyl-Lysine

6-Amino-2-{[hydroxy(4-hydroxypyrrolidin-2-yl)methylidene]amino}hexanoate

C11H21N3O4 (259.1532)

Hydroxyprolyl-Lysine is a dipeptide composed of hydroxyproline and lysine. It is an incomplete breakdown product of protein digestion or protein catabolism. Some dipeptides are known to have physiological or cell-signaling effects although most are simply short-lived intermediates on their way to specific amino acid degradation pathways following further proteolysis. This dipeptide has not yet been identified in human tissues or biofluids and so it is classified as an Expected metabolite.

Isoleucyl-Gamma-glutamate

2-Amino-4-[(2-amino-3-methylpentanoyl)-C-hydroxycarbonimidoyl]butanoate

C11H21N3O4 (259.1532)

Isoleucyl-Gamma-glutamate is a dipeptide composed of isoleucine and gamma-glutamate. It is an incomplete breakdown product of protein digestion or protein catabolism. Some dipeptides are known to have physiological or cell-signaling effects although most are simply short-lived intermediates on their way to specific amino acid degradation pathways following further proteolysis. This dipeptide has not yet been identified in human tissues or biofluids and so it is classified as an Expected metabolite.

Leucyl-Glutamine

2-[(2-Amino-1-hydroxy-4-methylpentylidene)amino]-4-(C-hydroxycarbonimidoyl)butanoate

C11H21N3O4 (259.1532)

Leucyl-Glutamine is a dipeptide composed of leucine and glutamine. It is an incomplete breakdown product of protein digestion or protein catabolism. Some dipeptides are known to have physiological or cell-signaling effects although most are simply short-lived intermediates on their way to specific amino acid degradation pathways following further proteolysis. This dipeptide has not yet been identified in human tissues or biofluids and so it is classified as an Expected metabolite.

Leucyl-Gamma-glutamate

2-Amino-4-[(2-amino-4-methylpentanoyl)-C-hydroxycarbonimidoyl]butanoate

C11H21N3O4 (259.1532)

Leucyl-Gamma-glutamate is a dipeptide composed of leucine and gamma-glutamate. It is an incomplete breakdown product of protein digestion or protein catabolism. Some dipeptides are known to have physiological or cell-signaling effects although most are simply short-lived intermediates on their way to specific amino acid degradation pathways following further proteolysis. This dipeptide has not yet been identified in human tissues or biofluids and so it is classified as an Expected metabolite.

Lysylhydroxyproline

(2S,4R)-1-[(2S)-2,6-diaminohexanoyl]-4-hydroxypyrrolidine-2-carboxylic acid

C11H21N3O4 (259.1532)

Lysylhydroxyproline is a dipeptide composed of lysine and hydroxyproline. It is an incomplete breakdown product of protein digestion or protein catabolism. Some dipeptides are known to have physiological or cell-signaling effects although most are simply short-lived intermediates on their way to specific amino acid degradation pathways following further proteolysis.

3-Oxopentanoylcarnitine

3-[(3-oxopentanoyl)oxy]-4-(trimethylazaniumyl)butanoate

C12H21NO5 (259.142)

3-oxopentanoylcarnitine is an acylcarnitine. More specifically, it is an 3-oxopentanoic acid ester of carnitine. Acylcarnitines were first discovered more than 70 year ago (PMID: 13825279). It is believed that there are more than 1000 types of acylcarnitines in the human body. The general role of acylcarnitines is to transport acyl-groups (organic acids and fatty acids) from the cytoplasm into the mitochondria so that they can be broken down to produce energy. This process is known as beta-oxidation. According to a recent review [Dambrova et al. 2021, Physiological Reviews], acylcarnitines (ACs) can be classified into 9 different categories depending on the type and size of their acyl-group: 1) short-chain ACs; 2) medium-chain ACs; 3) long-chain ACs; 4) very long-chain ACs; 5) hydroxy ACs; 6) branched chain ACs; 7) unsaturated ACs; 8) dicarboxylic ACs and 9) miscellaneous ACs. Short-chain ACs have acyl-groups with two to five carbons (C2-C5), medium-chain ACs have acyl-groups with six to thirteen carbons (C6-C13), long-chain ACs have acyl-groups with fourteen to twenty once carbons (C14-C21) and very long-chain ACs have acyl groups with more than 22 carbons. 3-oxopentanoylcarnitine is therefore classified as a short chain AC. As a short-chain acylcarnitine 3-oxopentanoylcarnitine is a member of the most abundant group of carnitines in the body, comprising more than 50\\% of all acylcarnitines quantified in tissues and biofluids (PMID: 31920980). Some short-chain carnitines have been studied as supplements or treatments for a number of diseases, including neurological disorders and inborn errors of metabolism. Carnitine acetyltransferase (CrAT, EC:2.3.1.7) is responsible for the synthesis of all short-chain and short branched-chain acylcarnitines (PMID: 23485643). The study of acylcarnitines is an active area of research and it is likely that many novel acylcarnitines will be discovered in the coming years. It is also likely that many novel roles in health and disease will be uncovered. An excellent review of the current state of knowledge for acylcarnitines is available at [Dambrova et al. 2021, Physiological Reviews].

4-Oxopentanoylcarnitine

3-[(4-oxopentanoyl)oxy]-4-(trimethylazaniumyl)butanoate

C12H21NO5 (259.142)

4-oxopentanoylcarnitine is an acylcarnitine. More specifically, it is an 4-oxopentanoic acid ester of carnitine. Acylcarnitines were first discovered more than 70 year ago (PMID: 13825279). It is believed that there are more than 1000 types of acylcarnitines in the human body. The general role of acylcarnitines is to transport acyl-groups (organic acids and fatty acids) from the cytoplasm into the mitochondria so that they can be broken down to produce energy. This process is known as beta-oxidation. According to a recent review [Dambrova et al. 2021, Physiological Reviews], acylcarnitines (ACs) can be classified into 9 different categories depending on the type and size of their acyl-group: 1) short-chain ACs; 2) medium-chain ACs; 3) long-chain ACs; 4) very long-chain ACs; 5) hydroxy ACs; 6) branched chain ACs; 7) unsaturated ACs; 8) dicarboxylic ACs and 9) miscellaneous ACs. Short-chain ACs have acyl-groups with two to five carbons (C2-C5), medium-chain ACs have acyl-groups with six to thirteen carbons (C6-C13), long-chain ACs have acyl-groups with fourteen to twenty once carbons (C14-C21) and very long-chain ACs have acyl groups with more than 22 carbons. 4-oxopentanoylcarnitine is therefore classified as a short chain AC. As a short-chain acylcarnitine 4-oxopentanoylcarnitine is a member of the most abundant group of carnitines in the body, comprising more than 50\\% of all acylcarnitines quantified in tissues and biofluids (PMID: 31920980). Some short-chain carnitines have been studied as supplements or treatments for a number of diseases, including neurological disorders and inborn errors of metabolism. Carnitine acetyltransferase (CrAT, EC:2.3.1.7) is responsible for the synthesis of all short-chain and short branched-chain acylcarnitines (PMID: 23485643). The study of acylcarnitines is an active area of research and it is likely that many novel acylcarnitines will be discovered in the coming years. It is also likely that many novel roles in health and disease will be uncovered. An excellent review of the current state of knowledge for acylcarnitines is available at [Dambrova et al. 2021, Physiological Reviews].

methyl 3-acetamido-4-O-acetyl-2,3,6-trideoxy-3-C-methyl-alpha-L-lyxo-hexopyranoside|Methyl N,O-diacetyl-alpha-L-vancosaminide

C12H21NO5 (259.142)

A dipeptide formed from L-isoleucine and L-glutamine residues.