Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5328
Number of amino acids:161
Molecular Weight:17834.32 Da
Theoretical pI:4.87


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)138.07%
Cysteine CYS (C)95.59%
Glutamic Acid GLU (E)1811.18%
Aspartic Acid ASP (D)95.59%
Glycine GLY (G)95.59%
Phynylalanine PHE (F)95.59%
Isoleucine ILE (I)63.73%
Histidine HIS (H)31.86%
Lysine LYS (K)127.45%
Methionine MET (M)21.24%
Leucine LEU (L)148.7%
Asparagine ASN (N)84.97%
Glutamine GLN (Q)31.86%
Proline PRO (P)42.48%
Serine SER (S)95.59%
Arginine ARG (R)63.73%
Threonine THR (T)84.97%
Tryptophan TRP (W)00%
Valine VAL (V)169.94%
Tyrosine TYR (Y)31.86%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC780
HydrogenH1238
NitrogenN208
OxygenO247
SulphurS11

FormulaC780H1238N208O247S11
Total Number of Atoms:2484


Total number of positively charged residues (ARG + LYS):18
Total number of negatively charged residues (ASP + GLU):27
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    4970
Absorption 0.1% (=1 g/l)    0.279,   assuming all pairs of CYS residues form cystines

Ext. coefficient    4470
Absorption 0.1% (=1 g/l)    0.251,   assuming all CYS residues are reduced
Aromaticity:0.075

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 25.91

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[29.81, 18.63, 29.19]

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:85.3416
Grand average of hydropathicity (GRAVY):-0.13