Acta Crystallographica Section C

Crystal Structure Communications

Volume 64, Part 3 (March 2008)

organic compounds

 

The monohydrates of the four polar dipeptides L-seryl-L-asparagine, L-seryl-L-tyrosine, L-tryptophanyl-L-serine and L-tyrosyl-L-tryptophan

C. H. Görbitz and L. M. Hartviksen

Abstract: The crystal structures of the four dipeptides L-seryl-L-asparagine monohydrate, C₇H₁₃N₃O₅·H₂O, L-seryl-L-tyrosine monohydrate, C₁₂H₁₆N₂O₅·H₂O, L-tryptophanyl-L-serine monohydrate, C₁₄H₁₇N₃O₄·H₂O, and L-tyrosyl-L-tryptophan monohydrate, C₂₀H₂₁N₃O₄·H₂O, are dominated by extensive hydrogen-bonding networks that include cocrystallized solvent water molecules. Side-chain conformations are discussed on the basis of previous observations in dipeptides. These four dipeptide structures greatly expand our knowledge on dipeptides incorporating polar residues such as serine, asparagine, threonine, tyrosine and tryptophan.

Formula: C₇H₁₃N₃O₅·H₂O, C₁₂H₁₆N₂O₅·H₂O, C₁₄H₁₇N₃O₄·H₂O and C₂₀H₂₁N₃O₄·H₂O

	Structure factor file (CIF format) (63.6 kbytes) [ doi:10.1107/S0108270108004228/gg3137SNsup2.hkl ] Contains datablock SN
	Structure factor file (CIF format) (95.1 kbytes) [ doi:10.1107/S0108270108004228/gg3137SYsup3.hkl ] Contains datablock SY
	Structure factor file (CIF format) (89.9 kbytes) [ doi:10.1107/S0108270108004228/gg3137WSsup4.hkl ] Contains datablock WS
	Structure factor file (CIF format) (110.3 kbytes) [ doi:10.1107/S0108270108004228/gg3137YWsup5.hkl ] Contains datablock YW

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