Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5127
Number of amino acids:918
Molecular Weight:103541.3 Da
Theoretical pI:6.49


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)576.21%
Cysteine CYS (C)50.54%
Glutamic Acid GLU (E)576.21%
Aspartic Acid ASP (D)475.12%
Glycine GLY (G)535.77%
Phynylalanine PHE (F)596.43%
Isoleucine ILE (I)616.64%
Histidine HIS (H)192.07%
Lysine LYS (K)535.77%
Methionine MET (M)242.61%
Leucine LEU (L)9410.24%
Asparagine ASN (N)384.14%
Glutamine GLN (Q)242.61%
Proline PRO (P)343.7%
Serine SER (S)798.61%
Arginine ARG (R)465.01%
Threonine THR (T)515.56%
Tryptophan TRP (W)131.42%
Valine VAL (V)778.39%
Tyrosine TYR (Y)272.94%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC4708
HydrogenH7354
NitrogenN1222
OxygenO1346
SulphurS29

FormulaC4708H7354N1222O1346S29
Total Number of Atoms:14659


Total number of positively charged residues (ARG + LYS):99
Total number of negatively charged residues (ASP + GLU):104
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    111980
Absorption 0.1% (=1 g/l)    1.081,   assuming all pairs of CYS residues form cystines

Ext. coefficient    111730
Absorption 0.1% (=1 g/l)    1.079,   assuming all CYS residues are reduced
Aromaticity:0.108

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 40.16

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[36.06, 22.22, 25.27]

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:96.3836
Grand average of hydropathicity (GRAVY):0.01