Physicochemical Properties of Peptide



PPepDB ID:PPepDB_2504
Number of amino acids:41
Molecular Weight:4505.09 Da
Theoretical pI:8.76


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)37.32%
Cysteine CYS (C)819.51%
Glutamic Acid GLU (E)00%
Aspartic Acid ASP (D)00%
Glycine GLY (G)512.2%
Phynylalanine PHE (F)00%
Isoleucine ILE (I)12.44%
Histidine HIS (H)24.88%
Lysine LYS (K)00%
Methionine MET (M)00%
Leucine LEU (L)12.44%
Asparagine ASN (N)37.32%
Glutamine GLN (Q)24.88%
Proline PRO (P)37.32%
Serine SER (S)49.76%
Arginine ARG (R)49.76%
Threonine THR (T)12.44%
Tryptophan TRP (W)24.88%
Valine VAL (V)00%
Tyrosine TYR (Y)24.88%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC184
HydrogenH276
NitrogenN64
OxygenO54
SulphurS8

FormulaC184H276N64O54S8
Total Number of Atoms:586


Total number of positively charged residues (ARG + LYS):4
Total number of negatively charged residues (ASP + GLU):0
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    14480
Absorption 0.1% (=1 g/l)    3.214,   assuming all pairs of CYS residues form cystines

Ext. coefficient    13980
Absorption 0.1% (=1 g/l)    3.103,   assuming all CYS residues are reduced
Aromaticity:0.098

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 26.23

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[14.63, 36.59, 9.76]

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:26.3414
Grand average of hydropathicity (GRAVY):-0.57