Physicochemical Properties of Peptide



PPepDB ID:PPepDB_6094
Number of amino acids:153
Molecular Weight:16505.04 Da
Theoretical pI:6.67


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)117.19%
Cysteine CYS (C)1610.46%
Glutamic Acid GLU (E)95.88%
Aspartic Acid ASP (D)63.92%
Glycine GLY (G)1610.46%
Phynylalanine PHE (F)53.27%
Isoleucine ILE (I)74.58%
Histidine HIS (H)21.31%
Lysine LYS (K)127.84%
Methionine MET (M)42.61%
Leucine LEU (L)95.88%
Asparagine ASN (N)95.88%
Glutamine GLN (Q)10.65%
Proline PRO (P)117.19%
Serine SER (S)95.88%
Arginine ARG (R)31.96%
Threonine THR (T)53.27%
Tryptophan TRP (W)00%
Valine VAL (V)85.23%
Tyrosine TYR (Y)106.54%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC718
HydrogenH1110
NitrogenN188
OxygenO218
SulphurS20

FormulaC718H1110N188O218S20
Total Number of Atoms:2254


Total number of positively charged residues (ARG + LYS):15
Total number of negatively charged residues (ASP + GLU):15
Extinction Coefficient:This protein does not contain any Tryptophan residues. Experience shows that this could result in more than 10% error in the computed extinction coefficient.

Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    15900
Absorption 0.1% (=1 g/l)    0.963,   assuming all pairs of CYS residues form cystines

Ext. coefficient    14900
Absorption 0.1% (=1 g/l)    0.903,   assuming all CYS residues are reduced
Aromaticity:0.098

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 45.49

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[25.49, 29.41, 21.57]

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:63.1372
Grand average of hydropathicity (GRAVY):-0.14