Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5170
Number of amino acids:489
Molecular Weight:54630.29 Da
Theoretical pI:7.74


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)397.98%
Cysteine CYS (C)61.23%
Glutamic Acid GLU (E)173.48%
Aspartic Acid ASP (D)336.75%
Glycine GLY (G)408.18%
Phynylalanine PHE (F)265.32%
Isoleucine ILE (I)204.09%
Histidine HIS (H)132.66%
Lysine LYS (K)285.73%
Methionine MET (M)173.48%
Leucine LEU (L)428.59%
Asparagine ASN (N)183.68%
Glutamine GLN (Q)173.48%
Proline PRO (P)255.11%
Serine SER (S)387.77%
Arginine ARG (R)234.7%
Threonine THR (T)214.29%
Tryptophan TRP (W)71.43%
Valine VAL (V)336.75%
Tyrosine TYR (Y)265.32%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC2463
HydrogenH3760
NitrogenN654
OxygenO710
SulphurS23

FormulaC2463H3760N654O710S23
Total Number of Atoms:7610


Total number of positively charged residues (ARG + LYS):51
Total number of negatively charged residues (ASP + GLU):50
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    77615
Absorption 0.1% (=1 g/l)    1.421,   assuming all pairs of CYS residues form cystines

Ext. coefficient    77240
Absorption 0.1% (=1 g/l)    1.414,   assuming all CYS residues are reduced
Aromaticity:0.121

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 35.22

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[31.49, 24.74, 23.52]

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:76.9939
Grand average of hydropathicity (GRAVY):-0.23