Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4455
Number of amino acids:438
Molecular Weight:49938 Da
Theoretical pI:6.15


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)153.42%
Cysteine CYS (C)102.28%
Glutamic Acid GLU (E)276.16%
Aspartic Acid ASP (D)163.65%
Glycine GLY (G)327.31%
Phynylalanine PHE (F)184.11%
Isoleucine ILE (I)296.62%
Histidine HIS (H)112.51%
Lysine LYS (K)245.48%
Methionine MET (M)92.05%
Leucine LEU (L)419.36%
Asparagine ASN (N)225.02%
Glutamine GLN (Q)163.65%
Proline PRO (P)255.71%
Serine SER (S)378.45%
Arginine ARG (R)143.2%
Threonine THR (T)245.48%
Tryptophan TRP (W)92.05%
Valine VAL (V)286.39%
Tyrosine TYR (Y)317.08%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC2277
HydrogenH3447
NitrogenN573
OxygenO655
SulphurS19

FormulaC2277H3447N573O655S19
Total Number of Atoms:6971


Total number of positively charged residues (ARG + LYS):38
Total number of negatively charged residues (ASP + GLU):43
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    96315
Absorption 0.1% (=1 g/l)    1.929,   assuming all pairs of CYS residues form cystines

Ext. coefficient    95690
Absorption 0.1% (=1 g/l)    1.916,   assuming all CYS residues are reduced
Aromaticity:0.132

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 36.51

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[35.62, 26.48, 21.00]

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:84.2922
Grand average of hydropathicity (GRAVY):-0.23