Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5808
Number of amino acids:392
Molecular Weight:43681.96 Da
Theoretical pI:5.08


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)246.12%
Cysteine CYS (C)123.06%
Glutamic Acid GLU (E)174.34%
Aspartic Acid ASP (D)307.65%
Glycine GLY (G)307.65%
Phynylalanine PHE (F)194.85%
Isoleucine ILE (I)287.14%
Histidine HIS (H)71.79%
Lysine LYS (K)164.08%
Methionine MET (M)92.3%
Leucine LEU (L)246.12%
Asparagine ASN (N)287.14%
Glutamine GLN (Q)102.55%
Proline PRO (P)164.08%
Serine SER (S)358.93%
Arginine ARG (R)194.85%
Threonine THR (T)235.87%
Tryptophan TRP (W)82.04%
Valine VAL (V)225.61%
Tyrosine TYR (Y)153.83%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1925
HydrogenH2943
NitrogenN525
OxygenO598
SulphurS21

FormulaC1925H2943N525O598S21
Total Number of Atoms:6012


Total number of positively charged residues (ARG + LYS):35
Total number of negatively charged residues (ASP + GLU):47
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    67100
Absorption 0.1% (=1 g/l)    1.536,   assuming all pairs of CYS residues form cystines

Ext. coefficient    66350
Absorption 0.1% (=1 g/l)    1.519,   assuming all CYS residues are reduced
Aromaticity:0.107

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 41.72

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[29.59, 27.81, 18.88]

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:74.1327
Grand average of hydropathicity (GRAVY):-0.31