Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5279
Number of amino acids:310
Molecular Weight:34331.55 Da
Theoretical pI:9.31


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)247.74%
Cysteine CYS (C)92.9%
Glutamic Acid GLU (E)134.19%
Aspartic Acid ASP (D)206.45%
Glycine GLY (G)237.42%
Phynylalanine PHE (F)185.81%
Isoleucine ILE (I)216.77%
Histidine HIS (H)51.61%
Lysine LYS (K)196.13%
Methionine MET (M)82.58%
Leucine LEU (L)206.45%
Asparagine ASN (N)144.52%
Glutamine GLN (Q)82.58%
Proline PRO (P)134.19%
Serine SER (S)227.1%
Arginine ARG (R)258.06%
Threonine THR (T)175.48%
Tryptophan TRP (W)20.65%
Valine VAL (V)258.06%
Tyrosine TYR (Y)41.29%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1510
HydrogenH2424
NitrogenN438
OxygenO442
SulphurS17

FormulaC1510H2424N438O442S17
Total Number of Atoms:4831


Total number of positively charged residues (ARG + LYS):44
Total number of negatively charged residues (ASP + GLU):33
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    17460
Absorption 0.1% (=1 g/l)    0.509,   assuming all pairs of CYS residues form cystines

Ext. coefficient    16960
Absorption 0.1% (=1 g/l)    0.494,   assuming all CYS residues are reduced
Aromaticity:0.077

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 29.18

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[29.03, 23.23, 20.97]

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:82.7097
Grand average of hydropathicity (GRAVY):-0.18