Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4027
Number of amino acids:567
Molecular Weight:63409.87 Da
Theoretical pI:9.24


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)305.29%
Cysteine CYS (C)122.12%
Glutamic Acid GLU (E)142.47%
Aspartic Acid ASP (D)335.82%
Glycine GLY (G)437.58%
Phynylalanine PHE (F)183.17%
Isoleucine ILE (I)386.7%
Histidine HIS (H)50.88%
Lysine LYS (K)91.59%
Methionine MET (M)122.12%
Leucine LEU (L)457.94%
Asparagine ASN (N)295.11%
Glutamine GLN (Q)254.41%
Proline PRO (P)264.59%
Serine SER (S)5910.41%
Arginine ARG (R)518.99%
Threonine THR (T)427.41%
Tryptophan TRP (W)152.65%
Valine VAL (V)417.23%
Tyrosine TYR (Y)203.53%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC2790
HydrogenH4386
NitrogenN808
OxygenO837
SulphurS24

FormulaC2790H4386N808O837S24
Total Number of Atoms:8845


Total number of positively charged residues (ARG + LYS):60
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    113050
Absorption 0.1% (=1 g/l)    1.783,   assuming all pairs of CYS residues form cystines

Ext. coefficient    112300
Absorption 0.1% (=1 g/l)    1.771,   assuming all CYS residues are reduced
Aromaticity:0.093

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 40.50

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[31.22, 27.69, 17.81]

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:83.351
Grand average of hydropathicity (GRAVY):-0.24