Physicochemical Properties of Peptide



PPepDB ID:PPepDB_2253
Number of amino acids:105
Molecular Weight:11052.88 Da
Theoretical pI:6.15


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)1110.48%
Cysteine CYS (C)87.62%
Glutamic Acid GLU (E)43.81%
Aspartic Acid ASP (D)76.67%
Glycine GLY (G)1312.38%
Phynylalanine PHE (F)32.86%
Isoleucine ILE (I)43.81%
Histidine HIS (H)00%
Lysine LYS (K)65.71%
Methionine MET (M)76.67%
Leucine LEU (L)98.57%
Asparagine ASN (N)32.86%
Glutamine GLN (Q)32.86%
Proline PRO (P)32.86%
Serine SER (S)54.76%
Arginine ARG (R)54.76%
Threonine THR (T)76.67%
Tryptophan TRP (W)00%
Valine VAL (V)54.76%
Tyrosine TYR (Y)21.9%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC465
HydrogenH764
NitrogenN132
OxygenO148
SulphurS15

FormulaC465H764N132O148S15
Total Number of Atoms:1524


Total number of positively charged residues (ARG + LYS):11
Total number of negatively charged residues (ASP + GLU):11
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    3480
Absorption 0.1% (=1 g/l)    0.315,   assuming all pairs of CYS residues form cystines

Ext. coefficient    2980
Absorption 0.1% (=1 g/l)    0.270,   assuming all CYS residues are reduced
Aromaticity:0.048

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 28.68

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[21.90, 22.86, 29.52]

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:72.5714
Grand average of hydropathicity (GRAVY):0.07