Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5783
Number of amino acids:196
Molecular Weight:21026.98 Da
Theoretical pI:4.65


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)126.12%
Cysteine CYS (C)52.55%
Glutamic Acid GLU (E)52.55%
Aspartic Acid ASP (D)115.61%
Glycine GLY (G)126.12%
Phynylalanine PHE (F)136.63%
Isoleucine ILE (I)84.08%
Histidine HIS (H)42.04%
Lysine LYS (K)52.55%
Methionine MET (M)42.04%
Leucine LEU (L)2914.8%
Asparagine ASN (N)157.65%
Glutamine GLN (Q)31.53%
Proline PRO (P)126.12%
Serine SER (S)2211.22%
Arginine ARG (R)31.53%
Threonine THR (T)178.67%
Tryptophan TRP (W)10.51%
Valine VAL (V)126.12%
Tyrosine TYR (Y)31.53%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC942
HydrogenH1469
NitrogenN237
OxygenO289
SulphurS9

FormulaC942H1469N237O289S9
Total Number of Atoms:2946


Total number of positively charged residues (ARG + LYS):8
Total number of negatively charged residues (ASP + GLU):16
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    10220
Absorption 0.1% (=1 g/l)    0.486,   assuming all pairs of CYS residues form cystines

Ext. coefficient    9970
Absorption 0.1% (=1 g/l)    0.474,   assuming all CYS residues are reduced
Aromaticity:0.087

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 27.74

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[33.67, 31.12, 25.51]

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:97.4999
Grand average of hydropathicity (GRAVY):0.26