Physicochemical Properties of Peptide



PPepDB ID:PPepDB_3559
Number of amino acids:35
Molecular Weight:3706.05 Da
Theoretical pI:4.43


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)00%
Cysteine CYS (C)822.86%
Glutamic Acid GLU (E)00%
Aspartic Acid ASP (D)38.57%
Glycine GLY (G)617.14%
Phynylalanine PHE (F)25.71%
Isoleucine ILE (I)00%
Histidine HIS (H)00%
Lysine LYS (K)12.86%
Methionine MET (M)00%
Leucine LEU (L)00%
Asparagine ASN (N)25.71%
Glutamine GLN (Q)38.57%
Proline PRO (P)25.71%
Serine SER (S)38.57%
Arginine ARG (R)12.86%
Threonine THR (T)25.71%
Tryptophan TRP (W)00%
Valine VAL (V)00%
Tyrosine TYR (Y)25.71%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC146
HydrogenH214
NitrogenN44
OxygenO54
SulphurS8

FormulaC146H214N44O54S8
Total Number of Atoms:466


Total number of positively charged residues (ARG + LYS):2
Total number of negatively charged residues (ASP + GLU):3
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    3480
Absorption 0.1% (=1 g/l)    0.939,   assuming all pairs of CYS residues form cystines

Ext. coefficient    2980
Absorption 0.1% (=1 g/l)    0.804,   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 : 23.89

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[11.43, 37.14, 0.00]

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:0
Grand average of hydropathicity (GRAVY):-0.65