Physicochemical Properties of Peptide



PPepDB ID:PPepDB_588
Number of amino acids:106
Molecular Weight:10936.76 Da
Theoretical pI:8.33


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)1413.21%
Cysteine CYS (C)65.66%
Glutamic Acid GLU (E)43.77%
Aspartic Acid ASP (D)43.77%
Glycine GLY (G)98.49%
Phynylalanine PHE (F)43.77%
Isoleucine ILE (I)65.66%
Histidine HIS (H)10.94%
Lysine LYS (K)54.72%
Methionine MET (M)10.94%
Leucine LEU (L)109.43%
Asparagine ASN (N)43.77%
Glutamine GLN (Q)10.94%
Proline PRO (P)43.77%
Serine SER (S)109.43%
Arginine ARG (R)54.72%
Threonine THR (T)54.72%
Tryptophan TRP (W)10.94%
Valine VAL (V)1211.32%
Tyrosine TYR (Y)00%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC479
HydrogenH788
NitrogenN134
OxygenO143
SulphurS7

FormulaC479H788N134O143S7
Total Number of Atoms:1551


Total number of positively charged residues (ARG + LYS):10
Total number of negatively charged residues (ASP + GLU):8
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    5875
Absorption 0.1% (=1 g/l)    0.537,   assuming all pairs of CYS residues form cystines

Ext. coefficient    5500
Absorption 0.1% (=1 g/l)    0.503,   assuming all CYS residues are reduced
Aromaticity:0.047

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 35.63

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[31.13, 25.47, 27.36]

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:104.906
Grand average of hydropathicity (GRAVY):0.53