Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5309
Number of amino acids:337
Molecular Weight:37203.81 Da
Theoretical pI:6.43


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)247.12%
Cysteine CYS (C)102.97%
Glutamic Acid GLU (E)226.53%
Aspartic Acid ASP (D)195.64%
Glycine GLY (G)226.53%
Phynylalanine PHE (F)195.64%
Isoleucine ILE (I)154.45%
Histidine HIS (H)30.89%
Lysine LYS (K)154.45%
Methionine MET (M)61.78%
Leucine LEU (L)3510.39%
Asparagine ASN (N)236.82%
Glutamine GLN (Q)92.67%
Proline PRO (P)123.56%
Serine SER (S)4112.17%
Arginine ARG (R)257.42%
Threonine THR (T)175.04%
Tryptophan TRP (W)10.3%
Valine VAL (V)133.86%
Tyrosine TYR (Y)61.78%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1609
HydrogenH2562
NitrogenN466
OxygenO516
SulphurS16

FormulaC1609H2562N466O516S16
Total Number of Atoms:5169


Total number of positively charged residues (ARG + LYS):40
Total number of negatively charged residues (ASP + GLU):41
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    15065
Absorption 0.1% (=1 g/l)    0.405,   assuming all pairs of CYS residues form cystines

Ext. coefficient    14440
Absorption 0.1% (=1 g/l)    0.388,   assuming all CYS residues are reduced
Aromaticity:0.077

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 50.87

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[26.41, 29.08, 25.82]

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:76.1723
Grand average of hydropathicity (GRAVY):-0.39