BB-rel@ldeleger:BB-rel-21498521 / 106-1786 JSONTXT

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bionlp-ost-19-BB-rel-train

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Id Subject Object Predicate Lexical cue
T2 0-1680 Paragraph denotes Vibrio fischeri, a bioluminescent marine bacterium, exists in an exclusive symbiotic relationship with the Hawaiian bobtail squid, Euprymna scolopes, whose light organ it colonizes. Previously, it has been shown that the lipopolysaccharide (LPS) or free lipid A of V. fischeri can trigger morphological changes in the juvenile squid's light organ that occur upon colonization. To investigate the structural features that might be responsible for this phenomenon, the lipid A from V. fischeri ES114 LPS was isolated and characterized by multistage mass spectrometry (MS(n)). A microheterogeneous mixture of mono- and diphosphorylated diglucosamine disaccharides was observed with variable states of acylation ranging from tetra- to octaacylated forms. All lipid A species, however, contained a set of conserved primary acyl chains consisting of an N-linked C14:0(3-OH) at the 2-position, an unusual N-linked C14:1(3-OH) at the 2'-position, and two O-linked C12:0(3-OH) fatty acids at the 3- and 3'-positions. The fatty acids found in secondary acylation were considerably more variable, with either a C12:0 or C16:1 at the 2-position, C14:0 or C14:0(3-OH) at the 2'-position, and C12:0 or no substituent at the 3'-position. Most surprising was the presence of an unusual set of modifications at the secondary acylation site of the 3-position consisting of phosphoglycerol (GroP), lysophosphatidic acid (GroP bearing C12:0, C16:0, or C16:1), or phosphatidic acid (GroP bearing either C16:0 + C12:0 or C16:0 + C16:1). Given their unusual nature, it is possible that these features of the V. fischeri lipid A may underlie the ability of E. scolopes to recognize its symbiotic partner.
T4 0-15 Microorganism denotes Vibrio fischeri
T5 19-33 Phenotype denotes bioluminescent
T6 34-40 Habitat denotes marine
T7 65-97 Phenotype denotes exclusive symbiotic relationship
T8 107-129 Habitat denotes Hawaiian bobtail squid
T9 131-148 Habitat denotes Euprymna scolopes
T10 156-167 Habitat denotes light organ
T11 265-276 Microorganism denotes V. fischeri
T12 318-346 Habitat denotes juvenile squid's light organ
T13 318-332 Habitat denotes juvenile squid
T14 480-497 Microorganism denotes V. fischeri ES114
T15 576-660 Habitat denotes microheterogeneous mixture of mono- and diphosphorylated diglucosamine disaccharides
T16 1585-1596 Microorganism denotes V. fischeri
T17 1633-1644 Habitat denotes E. scolopes
T18 1662-1671 Phenotype denotes symbiotic
E3 0-15 Lives_In denotes Vibrio fischeri
E4 0-15 Lives_In denotes Vibrio fischeri
E5 0-15 Lives_In denotes Vibrio fischeri
E6 0-15 Lives_In denotes Vibrio fischeri
E1 0-15 Exhibits denotes Vibrio fischeri
E2 0-15 Exhibits denotes Vibrio fischeri
E7 265-276 Lives_In denotes V. fischeri
E9 1585-1596 Lives_In denotes V. fischeri
E8 1585-1596 Exhibits denotes V. fischeri
R14 E7 T12 Location V. fischeri,juvenile squid's light organ
R1 E3 T4 Microorganism Vibrio fischeri,Vibrio fischeri
R2 E3 T6 Location Vibrio fischeri,marine
R3 E4 T4 Microorganism Vibrio fischeri,Vibrio fischeri
R4 E4 T9 Location Vibrio fischeri,Euprymna scolopes
R5 E5 T4 Microorganism Vibrio fischeri,Vibrio fischeri
R6 E5 T8 Location Vibrio fischeri,Hawaiian bobtail squid
R7 E6 T4 Microorganism Vibrio fischeri,Vibrio fischeri
R8 E6 T10 Location Vibrio fischeri,light organ
R9 E1 T4 Microorganism Vibrio fischeri,Vibrio fischeri
R10 E1 T5 Property Vibrio fischeri,bioluminescent
R11 E2 T4 Microorganism Vibrio fischeri,Vibrio fischeri
R12 E2 T7 Property Vibrio fischeri,exclusive symbiotic relationship
R13 E7 T11 Microorganism V. fischeri,V. fischeri
R15 E9 T16 Microorganism V. fischeri,V. fischeri
R16 E9 T17 Location V. fischeri,E. scolopes
R17 E8 T16 Microorganism V. fischeri,V. fischeri
R18 E8 T18 Property V. fischeri,symbiotic