Physicochemical Properties of Peptide



PPepDB ID:PPepDB_2178
Number of amino acids:35
Molecular Weight:3468.85 Da
Theoretical pI:8.29


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)12.86%
Cysteine CYS (C)617.14%
Glutamic Acid GLU (E)00%
Aspartic Acid ASP (D)00%
Glycine GLY (G)1131.43%
Phynylalanine PHE (F)00%
Isoleucine ILE (I)00%
Histidine HIS (H)12.86%
Lysine LYS (K)12.86%
Methionine MET (M)00%
Leucine LEU (L)12.86%
Asparagine ASN (N)12.86%
Glutamine GLN (Q)25.71%
Proline PRO (P)38.57%
Serine SER (S)38.57%
Arginine ARG (R)12.86%
Threonine THR (T)00%
Tryptophan TRP (W)12.86%
Valine VAL (V)00%
Tyrosine TYR (Y)38.57%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC143
HydrogenH207
NitrogenN45
OxygenO45
SulphurS6

FormulaC143H207N45O45S6
Total Number of Atoms:446


Total number of positively charged residues (ARG + LYS):2
Total number of negatively charged residues (ASP + GLU):0
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    10345
Absorption 0.1% (=1 g/l)    2.982,   assuming all pairs of CYS residues form cystines

Ext. coefficient    9970
Absorption 0.1% (=1 g/l)    2.874,   assuming all CYS residues are reduced
Aromaticity:0.114

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 4.53

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[14.29, 51.43, 5.71]

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:14
Grand average of hydropathicity (GRAVY):-0.51