Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4890
Number of amino acids:246
Molecular Weight:25883.81 Da
Theoretical pI:8.17


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)2610.57%
Cysteine CYS (C)83.25%
Glutamic Acid GLU (E)31.22%
Aspartic Acid ASP (D)93.66%
Glycine GLY (G)3614.63%
Phynylalanine PHE (F)156.1%
Isoleucine ILE (I)52.03%
Histidine HIS (H)52.03%
Lysine LYS (K)31.22%
Methionine MET (M)41.63%
Leucine LEU (L)156.1%
Asparagine ASN (N)156.1%
Glutamine GLN (Q)124.88%
Proline PRO (P)124.88%
Serine SER (S)218.54%
Arginine ARG (R)114.47%
Threonine THR (T)156.1%
Tryptophan TRP (W)62.44%
Valine VAL (V)166.5%
Tyrosine TYR (Y)93.66%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1144
HydrogenH1705
NitrogenN325
OxygenO343
SulphurS12

FormulaC1144H1705N325O343S12
Total Number of Atoms:3529


Total number of positively charged residues (ARG + LYS):14
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    46910
Absorption 0.1% (=1 g/l)    1.812,   assuming all pairs of CYS residues form cystines

Ext. coefficient    46410
Absorption 0.1% (=1 g/l)    1.793,   assuming all CYS residues are reduced
Aromaticity:0.122

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 38.99

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[26.83, 34.15, 19.51]

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:61.1382
Grand average of hydropathicity (GRAVY):-0.12