Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4064
Number of amino acids:189
Molecular Weight:19318.69 Da
Theoretical pI:6.3


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)1910.05%
Cysteine CYS (C)42.12%
Glutamic Acid GLU (E)31.59%
Aspartic Acid ASP (D)94.76%
Glycine GLY (G)178.99%
Phynylalanine PHE (F)73.7%
Isoleucine ILE (I)94.76%
Histidine HIS (H)31.59%
Lysine LYS (K)115.82%
Methionine MET (M)31.59%
Leucine LEU (L)126.35%
Asparagine ASN (N)52.65%
Glutamine GLN (Q)10.53%
Proline PRO (P)94.76%
Serine SER (S)3116.4%
Arginine ARG (R)00%
Threonine THR (T)2312.17%
Tryptophan TRP (W)31.59%
Valine VAL (V)147.41%
Tyrosine TYR (Y)63.17%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC854
HydrogenH1335
NitrogenN215
OxygenO280
SulphurS7

FormulaC854H1335N215O280S7
Total Number of Atoms:2691


Total number of positively charged residues (ARG + LYS):11
Total number of negatively charged residues (ASP + GLU):12
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    25690
Absorption 0.1% (=1 g/l)    1.330,   assuming all pairs of CYS residues form cystines

Ext. coefficient    25440
Absorption 0.1% (=1 g/l)    1.317,   assuming all CYS residues are reduced
Aromaticity:0.085

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 27.80

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[26.98, 32.80, 19.58]

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:74.8677
Grand average of hydropathicity (GRAVY):0.14