Physicochemical Properties of Peptide



PPepDB ID:PPepDB_586
Number of amino acids:86
Molecular Weight:9430.88 Da
Theoretical pI:5.11


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)66.98%
Cysteine CYS (C)66.98%
Glutamic Acid GLU (E)55.81%
Aspartic Acid ASP (D)44.65%
Glycine GLY (G)55.81%
Phynylalanine PHE (F)44.65%
Isoleucine ILE (I)44.65%
Histidine HIS (H)22.33%
Lysine LYS (K)44.65%
Methionine MET (M)11.16%
Leucine LEU (L)1112.79%
Asparagine ASN (N)66.98%
Glutamine GLN (Q)00%
Proline PRO (P)55.81%
Serine SER (S)55.81%
Arginine ARG (R)22.33%
Threonine THR (T)66.98%
Tryptophan TRP (W)00%
Valine VAL (V)66.98%
Tyrosine TYR (Y)44.65%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC420
HydrogenH656
NitrogenN106
OxygenO126
SulphurS7

FormulaC420H656N106O126S7
Total Number of Atoms:1315


Total number of positively charged residues (ARG + LYS):6
Total number of negatively charged residues (ASP + GLU):9
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    6335
Absorption 0.1% (=1 g/l)    0.672,   assuming all pairs of CYS residues form cystines

Ext. coefficient    5960
Absorption 0.1% (=1 g/l)    0.632,   assuming all CYS residues are reduced
Aromaticity:0.093

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 27.27

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[33.72, 24.42, 26.74]

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:95.2325
Grand average of hydropathicity (GRAVY):0.20