Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5486
Number of amino acids:264
Molecular Weight:30331.74 Da
Theoretical pI:9.15


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)93.41%
Cysteine CYS (C)114.17%
Glutamic Acid GLU (E)114.17%
Aspartic Acid ASP (D)114.17%
Glycine GLY (G)197.2%
Phynylalanine PHE (F)103.79%
Isoleucine ILE (I)103.79%
Histidine HIS (H)83.03%
Lysine LYS (K)145.3%
Methionine MET (M)83.03%
Leucine LEU (L)259.47%
Asparagine ASN (N)197.2%
Glutamine GLN (Q)124.55%
Proline PRO (P)72.65%
Serine SER (S)207.58%
Arginine ARG (R)197.2%
Threonine THR (T)124.55%
Tryptophan TRP (W)31.14%
Valine VAL (V)217.95%
Tyrosine TYR (Y)155.68%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1335
HydrogenH2087
NitrogenN385
OxygenO387
SulphurS19

FormulaC1335H2087N385O387S19
Total Number of Atoms:4213


Total number of positively charged residues (ARG + LYS):33
Total number of negatively charged residues (ASP + GLU):22
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    39475
Absorption 0.1% (=1 g/l)    1.301,   assuming all pairs of CYS residues form cystines

Ext. coefficient    38850
Absorption 0.1% (=1 g/l)    1.281,   assuming all CYS residues are reduced
Aromaticity:0.106

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 50.65

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[31.82, 24.62, 20.08]

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:78.1818
Grand average of hydropathicity (GRAVY):-0.38