Physicochemical Properties of Peptide



PPepDB ID:PPepDB_6004
Number of amino acids:173
Molecular Weight:18367.11 Da
Theoretical pI:9.11


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)1910.98%
Cysteine CYS (C)52.89%
Glutamic Acid GLU (E)31.73%
Aspartic Acid ASP (D)84.62%
Glycine GLY (G)116.36%
Phynylalanine PHE (F)74.05%
Isoleucine ILE (I)95.2%
Histidine HIS (H)10.58%
Lysine LYS (K)158.67%
Methionine MET (M)105.78%
Leucine LEU (L)116.36%
Asparagine ASN (N)116.36%
Glutamine GLN (Q)95.2%
Proline PRO (P)42.31%
Serine SER (S)2212.72%
Arginine ARG (R)21.16%
Threonine THR (T)126.94%
Tryptophan TRP (W)00%
Valine VAL (V)105.78%
Tyrosine TYR (Y)42.31%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC791
HydrogenH1286
NitrogenN216
OxygenO254
SulphurS15

FormulaC791H1286N216O254S15
Total Number of Atoms:2562


Total number of positively charged residues (ARG + LYS):17
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    6210
Absorption 0.1% (=1 g/l)    0.338,   assuming all pairs of CYS residues form cystines

Ext. coefficient    5960
Absorption 0.1% (=1 g/l)    0.324,   assuming all CYS residues are reduced
Aromaticity:0.064

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 35.25

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[23.70, 27.75, 24.86]

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:72.8324
Grand average of hydropathicity (GRAVY):-0.07