Common Name(2s,6s)-2,6-diaminoheptanedioate
DescriptionDiaminopimelic acid or DAPA is a lysine-like amino acid derivative that is a key component of the bacterial cell wall. DAPA is incorporated or integrated into peptidoglycan of gram negative bacteria and is the attachment point for Braun's lipoprotein (BLP or Murein Lipoprotein). BLP is found in gram-negative cell walls and is one of the most abundant membrane proteins. BLP is bound at its C-terminal end (a lysine) by a covalent bond to the peptidoglycan layer (specifically to diaminopimelic acid molecules) and is embedded in the outer membrane by its hydrophobic head (a cysteine with lipids attached). BLP tightly links the two layers and provides structural integrity to the bacterial outer membrane. Diaminopimelic acid can be found in human urine or feces due to the lysis or enzymatic breakdown of gram negative gut microbes.
Structure
Molecular FormulaC7H14N2O4
Average Mass190.19710
Monoisotopic Mass190.09536
IUPAC Name(2S,6S)-2,6-diaminoheptanedioic acid
Traditional Name2,6-diaminopimelic acid
CAS Registry Number583-93-7
SMILES[NH3+][C@@H](CCC[C@H]([NH3+])C(=O)[O-])C(=O)[O-]
InChI IdentifierInChI=1S/C7H14N2O4/c8-4(6(10)11)2-1-3-5(9)7(12)13/h4-5H,1-3,8-9H2,(H,10,11)(H,12,13)/t4-,5-/m0/s1
InChI KeyGMKMEZVLHJARHF-WHFBIAKZSA-N
CHEBI IDCHEBI:57609
HMDB IDHMDB0001370
StateSolid
Water Solubility1.41e+01 g/l
logP-4.13
logS-1.13
pKa (Strongest Acidic)1.85
pKa (Strongest Basic)9.83
Hydrogen Acceptor Count6
Hydrogen Donor Count4
Polar Surface Area126.64 Ų
Rotatable Bond Count6
Physiological Charge0
Formal Charge0
Refractivity43.64 m³·mol⁻¹
Polarizability18.63

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