Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5023
Number of amino acids:305
Molecular Weight:34145.47 Da
Theoretical pI:8.25


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)103.28%
Cysteine CYS (C)41.31%
Glutamic Acid GLU (E)92.95%
Aspartic Acid ASP (D)175.57%
Glycine GLY (G)278.85%
Phynylalanine PHE (F)165.25%
Isoleucine ILE (I)134.26%
Histidine HIS (H)41.31%
Lysine LYS (K)196.23%
Methionine MET (M)82.62%
Leucine LEU (L)258.2%
Asparagine ASN (N)227.21%
Glutamine GLN (Q)123.93%
Proline PRO (P)113.61%
Serine SER (S)3511.48%
Arginine ARG (R)92.95%
Threonine THR (T)206.56%
Tryptophan TRP (W)103.28%
Valine VAL (V)216.89%
Tyrosine TYR (Y)134.26%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1533
HydrogenH2325
NitrogenN403
OxygenO460
SulphurS12

FormulaC1533H2325N403O460S12
Total Number of Atoms:4733


Total number of positively charged residues (ARG + LYS):28
Total number of negatively charged residues (ASP + GLU):26
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    74620
Absorption 0.1% (=1 g/l)    2.185,   assuming all pairs of CYS residues form cystines

Ext. coefficient    74370
Absorption 0.1% (=1 g/l)    2.178,   assuming all CYS residues are reduced
Aromaticity:0.128

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 34.32

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[32.13, 31.15, 17.05]

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:71.8361
Grand average of hydropathicity (GRAVY):-0.34