Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5856
Number of amino acids:148
Molecular Weight:15866.91 Da
Theoretical pI:8.22


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)2818.92%
Cysteine CYS (C)74.73%
Glutamic Acid GLU (E)00%
Aspartic Acid ASP (D)96.08%
Glycine GLY (G)128.11%
Phynylalanine PHE (F)32.03%
Isoleucine ILE (I)42.7%
Histidine HIS (H)32.03%
Lysine LYS (K)42.7%
Methionine MET (M)32.03%
Leucine LEU (L)106.76%
Asparagine ASN (N)85.41%
Glutamine GLN (Q)96.08%
Proline PRO (P)53.38%
Serine SER (S)42.7%
Arginine ARG (R)74.73%
Threonine THR (T)128.11%
Tryptophan TRP (W)53.38%
Valine VAL (V)85.41%
Tyrosine TYR (Y)74.73%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC695
HydrogenH1063
NitrogenN201
OxygenO207
SulphurS10

FormulaC695H1063N201O207S10
Total Number of Atoms:2176


Total number of positively charged residues (ARG + LYS):11
Total number of negatively charged residues (ASP + GLU):9
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    38305
Absorption 0.1% (=1 g/l)    2.414,   assuming all pairs of CYS residues form cystines

Ext. coefficient    37930
Absorption 0.1% (=1 g/l)    2.391,   assuming all CYS residues are reduced
Aromaticity:0.101

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 13.51

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[25.00, 19.59, 27.70]

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:71.4865
Grand average of hydropathicity (GRAVY):-0.10