Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4383
Number of amino acids:425
Molecular Weight:48527.35 Da
Theoretical pI:4.46


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)317.29%
Cysteine CYS (C)30.71%
Glutamic Acid GLU (E)5212.24%
Aspartic Acid ASP (D)5112%
Glycine GLY (G)225.18%
Phynylalanine PHE (F)163.76%
Isoleucine ILE (I)194.47%
Histidine HIS (H)71.65%
Lysine LYS (K)5212.24%
Methionine MET (M)40.94%
Leucine LEU (L)235.41%
Asparagine ASN (N)153.53%
Glutamine GLN (Q)71.65%
Proline PRO (P)266.12%
Serine SER (S)235.41%
Arginine ARG (R)40.94%
Threonine THR (T)225.18%
Tryptophan TRP (W)133.06%
Valine VAL (V)194.47%
Tyrosine TYR (Y)163.76%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC2168
HydrogenH3262
NitrogenN538
OxygenO715
SulphurS7

FormulaC2168H3262N538O715S7
Total Number of Atoms:6690


Total number of positively charged residues (ARG + LYS):56
Total number of negatively charged residues (ASP + GLU):103
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    95465
Absorption 0.1% (=1 g/l)    1.967,   assuming all pairs of CYS residues form cystines

Ext. coefficient    95340
Absorption 0.1% (=1 g/l)    1.965,   assuming all CYS residues are reduced
Aromaticity:0.106

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 33.57

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[24.94, 20.24, 25.88]

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:58.8
Grand average of hydropathicity (GRAVY):-1.01