Physicochemical Properties of Peptide



PPepDB ID:PPepDB_254
Number of amino acids:11
Molecular Weight:1168.3 Da
Theoretical pI:5.08


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)19.09%
Cysteine CYS (C)19.09%
Glutamic Acid GLU (E)00%
Aspartic Acid ASP (D)19.09%
Glycine GLY (G)218.18%
Phynylalanine PHE (F)00%
Isoleucine ILE (I)00%
Histidine HIS (H)19.09%
Lysine LYS (K)00%
Methionine MET (M)19.09%
Leucine LEU (L)19.09%
Asparagine ASN (N)00%
Glutamine GLN (Q)00%
Proline PRO (P)00%
Serine SER (S)00%
Arginine ARG (R)00%
Threonine THR (T)218.18%
Tryptophan TRP (W)00%
Valine VAL (V)00%
Tyrosine TYR (Y)19.09%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC48
HydrogenH73
NitrogenN13
OxygenO17
SulphurS2

FormulaC48H73N13O17S2
Total Number of Atoms:153


Total number of positively charged residues (ARG + LYS):0
Total number of negatively charged residues (ASP + GLU):1
Extinction Coefficient:This protein does not contain any Tryptophan residues. Experience shows that this could result in more than 10% error in the computed extinction coefficient.

Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    1490
Absorption 0.1% (=1 g/l)    1.275,   assuming all pairs of CYS residues form cystines

Ext. coefficient    1490
Absorption 0.1% (=1 g/l)    1.275,   assuming all CYS residues are reduced
Aromaticity:0.091

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 35.37

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[18.18, 18.18, 27.27]

Amino acids in helix: V, I, Y, F, W, L || Amino acids in turn: N, P, G, S || Amino acids in sheet: E, M, A, L
Aliphatic index:44.5455
Grand average of hydropathicity (GRAVY):-0.02