N-acetylneuraminate

(4S,5R,6R)-5-acetamido-2,4-dihydroxy-6-[(1R,2R)-1,2, 3-trihydroxypropyl]oxane-2-carboxylic acid

Formula: C11H19NO9 (309.106)
Chinese Name: N-乙酰神经氨酸, 乙酰神经氨酸
BioDeep ID: BioDeep_00000001628 ( View LC/MS Profile)
SMILES: OCC(O)C(O)C([H])(O1)C(NC(C)=O)C(O)CC(O)(C(O)=O)1



Found 10 Sample Hits

m/z Adducts Species Organ Scanning Sample
332.0915 [M+Na]+
PPM:11.1
Vitis vinifera Fruit MALDI (DHB)
grape_dhb_91_1 - Grape Database
Resolution: 50μm, 120x114

Description

Grape berries fruit, condition: Ripe

332.0917 [M+Na]+
PPM:10.5
Vitis vinifera Fruit MALDI (DHB)
grape_dhb_164_1 - Grape Database
Resolution: 17μm, 136x122

Description

Grape berries fruit, condition: Late

348.1972 [M+K]+
PPM:18.7
Vitis vinifera Fruit MALDI (DHB)
grape_dhb_164_1 - Grape Database
Resolution: 17μm, 136x122

Description

Grape berries fruit, condition: Late

332.0904 [M+Na]+
PPM:14.4
Vitis vinifera Fruit MALDI (DHB)
grape_dhb_163_1 - Grape Database
Resolution: 17μm, 132x115

Description

Grape berries fruit, condition: Late

274.0965 [M+H-2H2O]+
PPM:16
Posidonia oceanica root MALDI (CHCA)
20190614_MS1_A19r-20 - MTBLS1746
Resolution: 17μm, 262x276

Description

Seagrasses are one of the most efficient natural sinks of carbon dioxide (CO2) on Earth. Despite covering less than 0.1% of coastal regions, they have the capacity to bury up to 10% of marine organic matter and can bury the same amount of carbon 35 times faster than tropical rainforests. On land, the soil’s ability to sequestrate carbon is intimately linked to microbial metabolism. Despite the growing attention to the link between plant production, microbial communities, and the carbon cycle in terrestrial ecosystems, these processes remain enigmatic in the sea. Here, we show that seagrasses excrete organic sugars, namely in the form of sucrose, into their rhizospheres. Surprisingly, the microbial communities living underneath meadows do not fully use this sugar stock in their metabolism. Instead, sucrose piles up in the sediments to mM concentrations underneath multiple types of seagrass meadows. Sediment incubation experiments show that microbial communities living underneath a meadow use sucrose at low metabolic rates. Our metagenomic analyses revealed that the distinct community of microorganisms occurring underneath meadows is limited in their ability to degrade simple sugars, which allows these compounds to persist in the environment over relatively long periods of time. Our findings reveal how seagrasses form blue carbon stocks despite the relatively small area they occupy. Unfortunately, anthropogenic disturbances are threatening the long-term persistence of seagrass meadows. Given that these sediments contain a large stock of sugars that heterotopic bacteria can degrade, it is even more important to protect these ecosystems from degradation.

309.1252 [M-H2O+NH4]+
PPM:13.1
Posidonia oceanica root MALDI (CHCA)
20190614_MS1_A19r-20 - MTBLS1746
Resolution: 17μm, 262x276

Description

Seagrasses are one of the most efficient natural sinks of carbon dioxide (CO2) on Earth. Despite covering less than 0.1% of coastal regions, they have the capacity to bury up to 10% of marine organic matter and can bury the same amount of carbon 35 times faster than tropical rainforests. On land, the soil’s ability to sequestrate carbon is intimately linked to microbial metabolism. Despite the growing attention to the link between plant production, microbial communities, and the carbon cycle in terrestrial ecosystems, these processes remain enigmatic in the sea. Here, we show that seagrasses excrete organic sugars, namely in the form of sucrose, into their rhizospheres. Surprisingly, the microbial communities living underneath meadows do not fully use this sugar stock in their metabolism. Instead, sucrose piles up in the sediments to mM concentrations underneath multiple types of seagrass meadows. Sediment incubation experiments show that microbial communities living underneath a meadow use sucrose at low metabolic rates. Our metagenomic analyses revealed that the distinct community of microorganisms occurring underneath meadows is limited in their ability to degrade simple sugars, which allows these compounds to persist in the environment over relatively long periods of time. Our findings reveal how seagrasses form blue carbon stocks despite the relatively small area they occupy. Unfortunately, anthropogenic disturbances are threatening the long-term persistence of seagrass meadows. Given that these sediments contain a large stock of sugars that heterotopic bacteria can degrade, it is even more important to protect these ecosystems from degradation.

274.0968 [M+H-2H2O]+
PPM:17.1
Posidonia oceanica root MALDI (CHCA)
20190613_MS1_A19r-18 - MTBLS1746
Resolution: 17μm, 246x264

Description

309.1258 [M-H2O+NH4]+
PPM:11.1
Posidonia oceanica root MALDI (CHCA)
20190613_MS1_A19r-18 - MTBLS1746
Resolution: 17μm, 246x264

Description

348.1978 [M+K]+
PPM:17
Homo sapiens esophagus DESI ()
LNTO22_1_9 - MTBLS385
Resolution: 75μm, 89x74

Description

348.1975 [M+K]+
PPM:17.9
Homo sapiens esophagus DESI ()
LNTO22_1_7 - MTBLS385
Resolution: 75μm, 69x54

Description


Acquisition and generation of the data is financially supported in part by CREST/JST. KEIO_ID A018; [MS2] KO008824 KEIO_ID A018 N-Acetylneuraminic acid is a sialic acid monosaccharide ubiquitous on cell membrane glycoproteins and glycolipids of mammalian cell ganglioglycerides, which plays a biological role in neurotransmission, leukocyte vasodilation, and viral or bacterial infection.