Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5433
Number of amino acids:305
Molecular Weight:31370.29 Da
Theoretical pI:5.61


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)6420.98%
Cysteine CYS (C)30.98%
Glutamic Acid GLU (E)196.23%
Aspartic Acid ASP (D)113.61%
Glycine GLY (G)175.57%
Phynylalanine PHE (F)103.28%
Isoleucine ILE (I)144.59%
Histidine HIS (H)51.64%
Lysine LYS (K)206.56%
Methionine MET (M)41.31%
Leucine LEU (L)113.61%
Asparagine ASN (N)72.3%
Glutamine GLN (Q)92.95%
Proline PRO (P)196.23%
Serine SER (S)268.52%
Arginine ARG (R)51.64%
Threonine THR (T)258.2%
Tryptophan TRP (W)10.33%
Valine VAL (V)247.87%
Tyrosine TYR (Y)113.61%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1390
HydrogenH2189
NitrogenN367
OxygenO444
SulphurS7

FormulaC1390H2189N367O444S7
Total Number of Atoms:4397


Total number of positively charged residues (ARG + LYS):25
Total number of negatively charged residues (ASP + GLU):30
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    22015
Absorption 0.1% (=1 g/l)    0.702,   assuming all pairs of CYS residues form cystines

Ext. coefficient    21890
Absorption 0.1% (=1 g/l)    0.698,   assuming all CYS residues are reduced
Aromaticity:0.072

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 44.84

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[23.28, 22.62, 32.13]

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:75.7705
Grand average of hydropathicity (GRAVY):-0.01