Physicochemical Properties of Peptide



PPepDB ID:PPepDB_976
Number of amino acids:226
Molecular Weight:23725.95 Da
Theoretical pI:7.33


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)2410.62%
Cysteine CYS (C)167.08%
Glutamic Acid GLU (E)41.77%
Aspartic Acid ASP (D)135.75%
Glycine GLY (G)2812.39%
Phynylalanine PHE (F)104.42%
Isoleucine ILE (I)52.21%
Histidine HIS (H)10.44%
Lysine LYS (K)73.1%
Methionine MET (M)41.77%
Leucine LEU (L)167.08%
Asparagine ASN (N)83.54%
Glutamine GLN (Q)83.54%
Proline PRO (P)146.19%
Serine SER (S)125.31%
Arginine ARG (R)114.87%
Threonine THR (T)208.85%
Tryptophan TRP (W)31.33%
Valine VAL (V)146.19%
Tyrosine TYR (Y)83.54%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1031
HydrogenH1597
NitrogenN287
OxygenO317
SulphurS20

FormulaC1031H1597N287O317S20
Total Number of Atoms:3252


Total number of positively charged residues (ARG + LYS):18
Total number of negatively charged residues (ASP + GLU):17
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    29420
Absorption 0.1% (=1 g/l)    1.240,   assuming all pairs of CYS residues form cystines

Ext. coefficient    28420
Absorption 0.1% (=1 g/l)    1.198,   assuming all CYS residues are reduced
Aromaticity:0.093

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 32.48

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[24.78, 27.43, 21.24]

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:64.8231
Grand average of hydropathicity (GRAVY):-0.02