Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4091
Number of amino acids:396
Molecular Weight:42468.97 Da
Theoretical pI:7.15


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)215.3%
Cysteine CYS (C)133.28%
Glutamic Acid GLU (E)153.79%
Aspartic Acid ASP (D)225.56%
Glycine GLY (G)297.32%
Phynylalanine PHE (F)184.55%
Isoleucine ILE (I)246.06%
Histidine HIS (H)71.77%
Lysine LYS (K)307.58%
Methionine MET (M)30.76%
Leucine LEU (L)266.57%
Asparagine ASN (N)307.58%
Glutamine GLN (Q)174.29%
Proline PRO (P)225.56%
Serine SER (S)4310.86%
Arginine ARG (R)71.77%
Threonine THR (T)287.07%
Tryptophan TRP (W)30.76%
Valine VAL (V)348.59%
Tyrosine TYR (Y)41.01%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1859
HydrogenH2959
NitrogenN511
OxygenO593
SulphurS16

FormulaC1859H2959N511O593S16
Total Number of Atoms:5938


Total number of positively charged residues (ARG + LYS):37
Total number of negatively charged residues (ASP + GLU):37
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    23210
Absorption 0.1% (=1 g/l)    0.547,   assuming all pairs of CYS residues form cystines

Ext. coefficient    22460
Absorption 0.1% (=1 g/l)    0.529,   assuming all CYS residues are reduced
Aromaticity:0.063

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 38.12

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[27.53, 31.31, 16.41]

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:79.4445
Grand average of hydropathicity (GRAVY):-0.25