Physicochemical Properties of Peptide



PPepDB ID:PPepDB_3622
Number of amino acids:43
Molecular Weight:4800.02 Da
Theoretical pI:3.89


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)12.33%
Cysteine CYS (C)36.98%
Glutamic Acid GLU (E)12.33%
Aspartic Acid ASP (D)1023.26%
Glycine GLY (G)49.3%
Phynylalanine PHE (F)00%
Isoleucine ILE (I)12.33%
Histidine HIS (H)24.65%
Lysine LYS (K)00%
Methionine MET (M)00%
Leucine LEU (L)511.63%
Asparagine ASN (N)12.33%
Glutamine GLN (Q)613.95%
Proline PRO (P)12.33%
Serine SER (S)36.98%
Arginine ARG (R)24.65%
Threonine THR (T)12.33%
Tryptophan TRP (W)12.33%
Valine VAL (V)12.33%
Tyrosine TYR (Y)00%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC193
HydrogenH297
NitrogenN61
OxygenO77
SulphurS3

FormulaC193H297N61O77S3
Total Number of Atoms:631


Total number of positively charged residues (ARG + LYS):2
Total number of negatively charged residues (ASP + GLU):11
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    5625
Absorption 0.1% (=1 g/l)    1.172,   assuming all pairs of CYS residues form cystines

Ext. coefficient    5500
Absorption 0.1% (=1 g/l)    1.146,   assuming all CYS residues are reduced
Aromaticity:0.023

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 63.55

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[18.60, 20.93, 16.28]

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:63.4883
Grand average of hydropathicity (GRAVY):-1.13